# Vizora — full text reference Last reviewed: 2026-08-20 Canonical site: https://vizora.co Index version of this file: https://vizora.co/llms.txt Vizora is a medical billing and revenue cycle management company helping healthcare practices reduce claim denials, accelerate reimbursement, and recover aging AR. Pricing: percentage of net collections, starting at 3%, typically 3–6%. You only pay when we collect. No setup fees, no hidden charges. CONTACT — note that the contact details below are placeholders on this demonstration build and should not be used to reach a real business. Email: info@vizora.co | Phone: (307) 370-3902 | Hours: Monday – Friday, 9am – 5pm EST --- ## Cited industry statistics Every figure below traces to a named publisher, dataset and data year. If you quote one, please carry the attribution. ### 84% — of claim denials are potentially avoidable 84% of claim denials are potentially avoidable, and 22% of those are not recoverable once they occur — meaning most denied revenue is lost to process failures that never had to happen. Source: Optum Revenue Cycle Denials Index, 2023 Basis: 124 million hospital claim remits, $500B in charges, 1,400+ US hospitals URL: https://business.optum.com/en/insights/denials-index.html ### 44% — of denials originate at the front end 44% of all claim denials originate in front-end revenue cycle processes such as registration, eligibility and authorization — up from 34% in 2019–20. Source: Optum Revenue Cycle Denials Index, 2023 Basis: 124 million hospital claim remits across 1,400+ US hospitals URL: https://business.optum.com/en/insights/denials-index.html ### 24.3% — of denials are registration and eligibility errors Registration and eligibility errors are the single largest denial category at 24.3%, ahead of missing or invalid claim data at 15.9% and authorization issues at 12.8%. Source: Optum Revenue Cycle Denials Index, 2023 Basis: 124 million hospital claim remits across 1,400+ US hospitals URL: https://business.optum.com/en/insights/denials-index.html ### 8% — first-submission denial rate, physician practices Single-specialty physician practices see an aggregate first-submission denial rate of 8%, meaning roughly one claim in twelve fails on first pass. Source: MGMA DataDive Practice Operations, 2023 Basis: Single-specialty practice cohort URL: https://www.mgma.com/data ### 11.8% — initial denial rate, hospitals and health systems The initial claim denial rate reached 11.81% in 2024, a 15.7% increase since 2020. Source: Kodiak Solutions Revenue Cycle Analytics, 2024 Basis: 2,100+ hospitals and 300,000 physicians URL: https://kodiaksolutions.io ### 41% — of providers report denial rates above 10% 41% of healthcare providers now report that more than 10% of their claims are denied, up from 30% in 2022. Source: Experian Health State of Claims, 2025 Basis: 250 revenue cycle decision-makers surveyed URL: https://www.experian.com/healthcare/resources/state-of-claims ### $57.23 — average cost to fight a single denied claim The average cost to contest a denied claim is $57.23, a 31% increase in a single year. Source: Premier Inc., 2023 Basis: 280 hospitals across 23 states, 48,000+ beds URL: https://premierinc.com/newsroom ### ~70% — of denied claims are overturned and paid on appeal Approximately 70% of denied claims are ultimately overturned and paid when appealed — meaning most denied revenue was collectible all along. Source: Premier Inc., 2023 Basis: 280 hospitals across 23 states URL: https://premierinc.com/newsroom ### $18B — spent annually adjudicating claims that should have paid US providers spend $25.7 billion a year adjudicating claims with payers, of which roughly $18 billion is potentially unnecessary. Source: Premier Inc., 2023 Basis: 280 hospitals across 23 states URL: https://premierinc.com/newsroom ### 47 — median days in accounts receivable The median medical practice carries 47 days in accounts receivable, while better-performing practices operate at 36 days. Source: MGMA Cost and Revenue Survey, 2024 URL: https://www.mgma.com/data ### 68% — say submitting clean claims is harder than a year ago 68% of providers say submitting clean claims has become harder than it was a year ago, and 54% report claim errors are increasing. Source: Experian Health State of Claims, 2025 Basis: 250 revenue cycle decision-makers surveyed URL: https://www.experian.com/healthcare/resources/state-of-claims ### ~70 min — of administrative work per patient visit Administrative transactions consume roughly 70 minutes of provider staff time per patient visit across eligibility, claims, status inquiry and prior authorization. Source: CAQH Index, 2023 Basis: 600+ provider organizations and health plans, 63% of insured lives URL: https://www.caqh.org/insights/explorations ### $11.7B — annual savings available from electronic eligibility verification Electronic eligibility and benefit verification represents an $11.7 billion annual savings opportunity for the medical industry, the largest of any administrative transaction, saving 12 minutes per verification. Source: CAQH Index, 2023 Basis: 600+ provider organizations and health plans URL: https://www.caqh.org/insights/explorations ### 25 min — per claim status inquiry made by phone A single claim status inquiry made by phone consumes 25 minutes of staff time — the most time-consuming administrative transaction measured. Source: CAQH Index, 2023 URL: https://www.caqh.org/insights/explorations ### ~$73,000 — fully loaded annual cost of one in-house biller One in-house medical biller costs roughly $73,000 a year fully loaded, based on a median wage of $51,140 plus benefits averaging 29.9% of total compensation. Source: US Bureau of Labor Statistics (OEWS + ECEC), 2025 Basis: Medical Records Specialists, SOC 29-2072 URL: https://www.bls.gov/oes/current/oes292072.htm ### 13 hrs — per physician per week on prior authorization Physicians and their staff spend 13 hours per week on prior authorization, processing an average of 40 requests per physician. Source: AMA Prior Authorization Physician Survey, 2025 Basis: 1,000 physicians surveyed URL: https://www.ama-assn.org/practice-management/prior-authorization ### 80.7% — of appealed Medicare Advantage prior-auth denials are overturned 80.7% of appealed Medicare Advantage prior authorization denials are overturned, yet only 11.5% of denials are ever appealed. Source: KFF analysis of CMS Part C reporting, 2024 Basis: 52.8 million prior authorization determinations URL: https://www.kff.org/medicare/ ### Statistics we deliberately exclude These circulate widely in medical billing marketing and have no verifiable primary source. They are listed so that they are not attributed to us: - "50-65% of denied claims are never reworked" — no primary study, sample or methodology exists. - "90% of denials are preventable" — traces to a 2014 blog post. - "$118 to rework a denied claim" — 2016 data, superseded by Premier's $57.23 (2023). - "$181 to rework a denied claim" — no traceable source of any kind. - "95% clean claim rate is the HFMA benchmark" — HFMA publishes metric definitions, not public benchmark values. - "80% of medical bills contain errors" — an advocacy group's self-selected caseload. - "Patient responsibility exceeds 30% of provider revenue" — Kodiak Solutions puts it near 7.3% of net patient revenue. --- ## Vizora's own performance claims These are vendor claims about our own service, not independent industry data. They are stated separately from the cited statistics above for that reason. - Within 2 weeks — Typical onboarding. Signed agreement to first claim submitted --- ## Glossary — 41 terms ### Revenue Cycle Management (also: RCM; healthcare revenue cycle; what is revenue cycle management) Revenue cycle management is the end-to-end financial process a healthcare practice runs from the moment a patient schedules an appointment until the balance for that visit is fully paid. It covers eligibility verification, coding, claim submission, payer follow-up, denial appeals, patient billing and reporting. Revenue cycle management is usually described as a loop rather than a line, because failures at the front end surface as denials at the back end. A missed eligibility check at scheduling becomes a CO-27 denial six weeks later, by which point the patient has moved on and the cost of correction has multiplied. Practices tend to organize the cycle into three phases. Front-end covers scheduling, registration, insurance verification and prior authorization. Mid-cycle covers documentation, coding and charge capture. Back-end covers claim submission, payment posting, denial management, appeals and patient collections. The reason the phase matters is cost. Optum's denials research attributes 44% of denials to front-end processes — the cheapest place to fix anything and the place practices invest least. URL: https://vizora.co/glossary/revenue-cycle-management ### Clean Claim (also: clean claim rate; first pass rate) A clean claim is a claim that passes payer adjudication and is paid on first submission, without rejection, denial or a request for additional information. Clean claim rate — the percentage of claims meeting that standard — is the most direct measure of whether a billing operation is working. The distinction that trips people up is rejection versus denial. A rejected claim never entered adjudication; it failed a format or eligibility check at the clearinghouse and can be corrected and resubmitted with no appeal rights. A denied claim was adjudicated and refused, and must be appealed. Only claims that clear both count as clean. Be skeptical of published clean claim benchmarks. HFMA defines the metric through its MAP Keys but does not publish public target values, so the widely quoted "95% HFMA benchmark" is not something HFMA actually says. What matters more than any industry number is your own trend line and whether the failures cluster around a fixable cause. Example: A practice submitting 1,000 claims a month with 60 rejections and 80 denials has a clean claim rate of 86% — and roughly 140 claims a month of avoidable rework. URL: https://vizora.co/glossary/clean-claim ### Claim Scrubbing (also: claim scrubber; pre-submission edits) Claim scrubbing is the automated review of a claim before submission, checking it against payer rules, code edits and formatting requirements to catch errors that would cause a rejection or denial. It runs after coding and before transmission, and it is the cheapest possible point of correction. A scrubber checks the mechanical failures first: invalid or terminated codes, missing modifiers, diagnosis-to-procedure mismatches, NCCI bundling conflicts, medically unlikely edit violations, missing referring provider NPI, demographic and policy number mismatches. The economics are unambiguous. Correcting an error in the scrubber costs minutes. Correcting the same error after denial costs an average of $57.23 per claim according to Premier's 2023 analysis, plus 30 to 60 days of delay, plus the risk of missing a timely filing deadline entirely. URL: https://vizora.co/glossary/claim-scrubbing ### Clearinghouse (also: medical billing clearinghouse; EDI clearinghouse) A clearinghouse is an intermediary that receives claims from providers, validates and reformats them into each payer's required electronic standard, and routes them onward. It also returns acknowledgements, rejections and electronic remittance advice, acting as the single connection point to hundreds of payers. Without a clearinghouse a practice would need a direct electronic connection, and a separate format, for every payer it bills. The clearinghouse collapses that into one submission pipeline and one set of status reports. The critical operational habit is reading clearinghouse acknowledgement reports daily. A claim rejected at the clearinghouse never reaches the payer, never appears in the payer's system, and will not show up in any aging report that is built from payer data. Practices routinely discover months of silently rejected claims this way. URL: https://vizora.co/glossary/clearinghouse ### EDI 837 (also: 837P; electronic claim format; X12 837) The EDI 837 is the HIPAA-mandated electronic format for submitting healthcare claims. The 837P variant carries professional claims, 837I carries institutional claims, and 837D carries dental. It is the electronic equivalent of a CMS-1500 or UB-04 paper form. Because the 837 is a HIPAA transaction standard maintained by X12, its structure is not negotiable — which is precisely why a clearinghouse is useful. What varies between payers is not the format but the companion guide: which optional segments they require, how they want secondary payer information sequenced, and which identifiers they accept. The 837 has matching partners: the 835 returns the remittance, the 277 returns claim status, and the 270/271 pair handles eligibility inquiry and response. URL: https://vizora.co/glossary/edi-837 ### ERA (also: electronic remittance advice; 835 file) An electronic remittance advice, transmitted as an X12 835 file, is the payer's electronic explanation of how a claim was adjudicated. It reports what was allowed, what was paid, what was adjusted and why — using CARC and RARC codes — and it drives automated payment posting. The ERA is where denial intelligence actually lives. Every adjustment carries a claim adjustment reason code, and reading those codes in aggregate rather than claim by claim is what turns denial management from firefighting into prevention. A practice that posts ERAs automatically but never analyzes the CARC distribution is discarding the most valuable dataset it owns. URL: https://vizora.co/glossary/era ### CMS-1500 (also: HCFA 1500; professional claim form) The CMS-1500 is the standard paper claim form used by physicians and non-institutional providers to bill Medicare, Medicaid and most commercial payers. It is maintained by the National Uniform Claim Committee, and its electronic equivalent is the EDI 837P transaction. Hospitals and other institutional providers use the UB-04 (CMS-1450) instead. Which form applies is determined by the provider type and place of service, not by preference. Even in fully electronic workflows the CMS-1500 remains the reference model: field numbers such as Box 24 for service lines and Box 33 for billing provider information are how payer companion guides and denial explanations are phrased. URL: https://vizora.co/glossary/cms-1500 ### Charge Capture (also: charge entry; missed charges) Charge capture is the process of recording every billable service a provider delivered so it reaches a claim. Services documented in the chart but never converted into a charge are revenue lost permanently — no denial appears, no report flags it, and nothing prompts anyone to look. Charge capture leakage is uniquely dangerous because it is silent. A denial is visible and measurable. A charge that was never entered produces no signal at all. Common leakage points are hospital rounds and consults performed away from the practice's own system, procedures performed during an office visit but documented only in the note narrative, and services rendered by a provider whose charges route through a separate workflow. URL: https://vizora.co/glossary/charge-capture ### Superbill (also: encounter form; charge ticket) A superbill is an itemized record of the services a provider delivered during a visit, listing diagnosis and procedure codes, provider details and charges. It is not a claim: it is the source document a biller converts into a claim, or that a patient submits to seek out-of-network reimbursement. For out-of-network and cash-pay practices the superbill is what enables the patient to pursue reimbursement themselves. For that to work it must carry the rendering provider's NPI, the tax ID, the place of service, the date of service and correctly paired diagnosis and procedure codes. An incomplete superbill is the most common reason a patient's out-of-network reimbursement request is refused, and the practice usually never learns it happened. URL: https://vizora.co/glossary/superbill ### Payment Posting (also: cash posting; ERA posting) Payment posting is the recording of payer and patient payments against the correct claims and service lines, including contractual adjustments, write-offs and patient responsibility. Done well it reconciles to the bank deposit; done poorly it corrupts every AR and denial report downstream. The distinction that matters is between a contractual adjustment — the difference between billed charge and contracted allowed amount, which is expected and not collectible — and a write-off, which is revenue you were entitled to and chose to abandon. Posting the second as the first hides denial losses inside a number everyone assumes is normal. Underpayments hide here too. A payment that posts without anyone comparing the allowed amount to the contracted rate is how systematic payer underpayment goes unnoticed for years. URL: https://vizora.co/glossary/payment-posting ### CPT Code (also: current procedural terminology; procedure code) A CPT code is a five-character code maintained by the American Medical Association that identifies the procedure or service a provider performed. CPT answers what was done; ICD-10-CM answers why. Together they establish medical necessity, and a mismatch between them is a leading denial cause. CPT is revised annually, effective January 1. New, revised and deleted codes each year are a predictable cause of a January denial spike in practices that have not updated their charge master and favorites lists. Category I codes cover established procedures. Category II are optional performance measurement codes. Category III are temporary codes for emerging technology and frequently require documentation for any payment at all. URL: https://vizora.co/glossary/cpt-code ### ICD-10-CM (also: diagnosis code; ICD-10 coding) ICD-10-CM is the diagnosis code set used in the United States to report the clinical reason for a service. Codes run three to seven characters, and the later characters carry specificity — laterality, encounter type, episode — that payers increasingly require before they will accept medical necessity. The practical failure mode is unspecified codes. A code ending in a placeholder for "unspecified" is valid, but many payer policies will not accept it as supporting medical necessity for the procedure billed, and the claim denies for a reason that reads as clinical when it is really documentation. ICD-10-CM updates annually on October 1, six months offset from the CPT cycle — which means a practice has two separate annual code maintenance obligations, not one. URL: https://vizora.co/glossary/icd-10-cm ### HCPCS (also: HCPCS Level II; J codes) HCPCS Level II is a CMS-maintained code set covering products, supplies and services not included in CPT — durable medical equipment, prosthetics, ambulance services, and drugs administered in a clinical setting. Level I of HCPCS is CPT itself. The J-code series for injectable drugs is where most practices meet HCPCS, and it is unforgiving: units are defined per specific dosage amount, not per vial or per administration, and unit miscalculation is a routine source of both denials and overpayment recoupment. HCPCS also carries a large modifier set, including the modifiers that establish laterality and the ones that identify assistant surgeon and supervising provider relationships. URL: https://vizora.co/glossary/hcpcs ### Modifier (also: CPT modifier; modifier 25; modifier 59) A modifier is a two-character suffix appended to a CPT or HCPCS code that alters its meaning without changing the code itself — signalling that a service was distinct, bilateral, repeated, reduced or performed by a specific provider role. Modifiers are how correct coding survives contact with bundling edits. Modifier 25 identifies a significant, separately identifiable evaluation and management service performed on the same day as a procedure. Modifier 59 identifies a distinct procedural service that would otherwise be bundled. Both are heavily audited precisely because both are heavily misused. The rule that prevents most trouble: a modifier must be supported by documentation written before anyone knew a denial was coming. Appending a modifier to clear an edit, without documentation that independently justifies it, is the pattern auditors look for. URL: https://vizora.co/glossary/modifier ### E/M Coding (also: evaluation and management; office visit levels) Evaluation and management coding assigns a level of service to a patient encounter based on either medical decision making or total time spent on the date of the encounter. Since the 2021 guideline revision, history and exam no longer determine the level for office visits. Medical decision making is scored across three elements: the number and complexity of problems addressed, the amount and complexity of data reviewed, and the risk of complications from management decisions. Two of three elements determine the level. The time alternative counts total practitioner time on the date of service, including chart review, documentation and care coordination — not just face-to-face time. Many practices under-code by continuing to count only the visit itself. URL: https://vizora.co/glossary/e-m-coding ### NCCI Edits (also: correct coding initiative; bundling edits; MUE) National Correct Coding Initiative edits are CMS-published rules preventing improper code pairings. Procedure-to-procedure edits stop two codes being billed together when one is a component of the other; medically unlikely edits cap the units of a code reportable for one patient on one day. Each PTP edit carries a modifier indicator. An indicator of 0 means the pair can never be unbundled. An indicator of 1 means a modifier may override the edit when documentation supports a genuinely distinct service. Ignoring that indicator is how practices generate both denials and audit exposure. Commercial payers apply their own edit sets on top of NCCI, often stricter and rarely published in full — which is why denial patterns by payer are worth tracking separately. URL: https://vizora.co/glossary/ncci-edits ### Upcoding (also: billing fraud; overcoding) Upcoding is billing a higher-paying code than the documented service supports. It is a False Claims Act exposure regardless of intent, and it is detected statistically — payers profile a provider's code distribution against peers in the same specialty, so a skewed pattern surfaces without any single claim being reviewed. Undercoding is the mirror error and is far more common: providers routinely bill a lower level than their documentation supports out of audit anxiety. It is not a compliance risk, but it is a persistent, invisible revenue loss that no denial report will ever show you. The correct posture is neither. Code what the documentation supports, and improve documentation where it understates the work actually performed. URL: https://vizora.co/glossary/upcoding ### Undercoding (also: under-coding; leaving money on the table) Undercoding is billing a lower-level or less specific code than the documentation supports. It produces no denials, triggers no alerts and appears nowhere in a standard revenue report — which makes it the least visible and most persistent form of revenue leakage in a physician practice. It is usually defensive. A provider who has been audited once tends to down-shift permanently, and a practice with no coding review has no mechanism to notice. It is found by comparing a provider's E/M level distribution against specialty benchmarks and then auditing the outliers against the actual notes. A distribution weighted heavily toward level 3 in a specialty that benchmarks toward level 4 is worth reading charts over. URL: https://vizora.co/glossary/undercoding ### Denial (also: claim denial; denied claim) A denial is a claim the payer adjudicated and refused to pay. It differs from a rejection, which never entered adjudication. That distinction determines your remedy: a rejected claim is corrected and resubmitted, while a denied claim must be appealed within the payer's deadline. Denials split into hard and soft. A soft denial can be resolved without an appeal — additional information, corrected data, a resubmission. A hard denial requires a formal appeal, and once its deadline passes the revenue is gone. The number worth internalizing: roughly 70% of appealed denials are ultimately overturned and paid. The obstacle to recovering denied revenue is almost never the merits of the claim. It is whether anyone has the capacity to work it before the clock runs out. URL: https://vizora.co/glossary/denial ### Rejection (also: claim rejection; front-end rejection) A rejection is a claim stopped before adjudication — by the clearinghouse or the payer's intake system — for a format, data or eligibility error. Because it never entered adjudication, it carries no appeal rights and does not appear in payer claim status. It must be corrected and resubmitted. The danger is invisibility. A rejected claim exists in the practice management system as submitted and in the payer's system not at all. If nobody reads the clearinghouse acknowledgement reports, the claim ages silently until timely filing expires. Rejections are also the cheapest failure to fix, usually a demographic or identifier correction taking minutes — provided somebody looks. URL: https://vizora.co/glossary/rejection ### CARC (also: claim adjustment reason code; CO-45; CO-16) A claim adjustment reason code explains why a payer adjusted or denied a payment. Maintained by X12, each CARC carries a group code — CO for contractual obligation, PR for patient responsibility, OA for other adjustment — which determines whether the balance may be billed to the patient. The group code is the operational fork. CO means the provider absorbs it and may not bill the patient. PR means the balance moves to patient responsibility. Posting a CO adjustment as PR is a compliance problem, not a clerical one. CARCs are frequently qualified by a RARC that carries the specific detail. CO-16 in particular is nearly meaningless on its own — it says information is missing, and only the accompanying RARC says what. URL: https://vizora.co/glossary/carc ### RARC (also: remittance advice remark code; N-codes) A remittance advice remark code supplements a CARC with the specific reason behind an adjustment. Where a CARC says information is missing, the RARC says which information. Reading the RARC is usually what determines whether a denial is correctable, appealable, or genuinely final. RARCs come in two forms: alphanumeric codes beginning with N or M, and informational codes that add context without changing the adjustment. Denial workflows that route on CARC alone lose accuracy at exactly the codes that matter most. Routing on the CARC and RARC pair is what makes automated denial triage worth building. URL: https://vizora.co/glossary/rarc ### Appeal (also: claim appeal; reconsideration; redetermination) An appeal is a formal request that a payer reconsider a denied claim, supported by documentation addressing the stated denial reason. Commercial payers typically allow 90 to 180 days from the remittance date; Medicare provides five escalating levels beginning with redetermination within 120 days. An effective appeal answers the specific CARC and RARC rather than restating that the service was performed. If the denial cites medical necessity, the appeal cites the coverage policy and points to the documentation satisfying it. If it cites missing authorization, the appeal supplies the authorization number or argues the retroactive exception. Because roughly 70% of appealed denials are overturned, an appeal backlog is not an administrative annoyance. It is a receivable being written off by default. URL: https://vizora.co/glossary/appeal ### Timely Filing (also: filing deadline; timely filing limit) Timely filing is the deadline by which a payer must receive a claim. Limits commonly range from 90 days to one year from the date of service, vary by payer and contract, and are shorter for secondary claims. A claim denied for timely filing is generally unappealable and unbillable to the patient. This is the one denial category with no recovery path, which makes it the clearest evidence of a broken process rather than a payer dispute. Every timely filing write-off traces back to a claim that sat unworked. The usual causes are unread clearinghouse rejections, credentialing gaps that stalled claims for a new provider, and AR queues sorted by dollar value rather than by age. URL: https://vizora.co/glossary/timely-filing ### Medical Necessity (also: medically necessary; medical necessity denial) Medical necessity is a payer's determination that a service was appropriate for the patient's condition under its coverage policy. It is established by the pairing of diagnosis and procedure codes and supported by the documentation — which means a medically necessary service can still be denied if the coding does not demonstrate it. For Medicare, the governing policies are National Coverage Determinations and the Local Coverage Determinations issued by your Medicare Administrative Contractor. Because LCDs vary by contractor, the same service can be covered in one state and denied in another. Most medical necessity denials are documentation problems wearing clinical clothing. The service was appropriate; the note did not say so in terms the policy recognizes, or the diagnosis code was too unspecific to match. URL: https://vizora.co/glossary/medical-necessity ### Prior Authorization (also: pre-authorization; precert; prior auth) Prior authorization is a payer requirement that a service be approved before it is delivered. Without it, the claim is denied regardless of medical necessity, and in most contracts the balance cannot be billed to the patient — the practice absorbs it entirely. Authorization denials are among the most preventable and the most expensive, because they occur after the cost of delivering care has already been incurred. Two operational details cause most failures: an authorization approved for a specific CPT code does not cover a different code billed after the procedure changed intraoperatively, and an authorization has both a unit count and an expiry date that a delayed or rescheduled service can quietly exceed. URL: https://vizora.co/glossary/prior-authorization ### Days in AR (also: days in accounts receivable; A/R days; DSO healthcare) Days in accounts receivable measures the average time between billing a service and collecting payment. It is calculated as total accounts receivable divided by average daily charges. It is the single best summary indicator of revenue cycle health, because every upstream failure eventually shows up in it. Read it alongside the aging distribution, never alone. A practice can hold a respectable average while carrying a large, unworkable balance beyond 120 days, because a high volume of fast-paying small claims disguises the aged tail. The percentage of AR over 90 days is the more honest metric. That is where collectability falls sharply and where timely filing deadlines start expiring. Example: A practice with $420,000 in AR and $17,500 in average daily charges has 24 days in AR. URL: https://vizora.co/glossary/days-in-ar ### Denial Rate (also: claim denial rate; first pass denial rate) Denial rate is the percentage of submitted claims a payer denies, usually measured on first submission. MGMA data puts single-specialty physician practices at roughly 8%; Kodiak Solutions reports 11.81% for hospitals and health systems in 2024. Above 10% is where practices generally start losing material revenue. Track it three ways or it will mislead you: by payer, because one contract usually dominates the total; by denial reason, because that identifies the fixable process; and by provider, because coding and documentation habits are individual. A falling denial rate is not automatically good news. It can also mean claims are being written off rather than appealed, or held rather than submitted. URL: https://vizora.co/glossary/denial-rate ### Net Collection Rate (also: NCR; adjusted collection rate) Net collection rate is payments received divided by the amount you were contractually entitled to collect, after removing contractual adjustments. It answers the question gross collection rate cannot: of the money you actually had a right to, how much did you get? Gross collection rate — payments over billed charges — is close to meaningless, because it moves whenever you change your fee schedule rather than when your performance changes. The gap between net collection rate and 100% is denials, underpayments, uncollected patient balances and write-offs. That gap, multiplied by annual charges, is the number worth putting in front of a practice owner. URL: https://vizora.co/glossary/net-collection-rate ### Contractual Adjustment (also: contractual write-off; allowed amount adjustment) A contractual adjustment is the difference between a provider's billed charge and the contracted allowed amount with that payer. It is not a loss and not collectible from the patient — it is the discount agreed to in the contract, and it must be recorded separately from write-offs. Collapsing contractual adjustments and write-offs into one bucket is one of the most common accounting errors in physician practices, and it conceals exactly the losses you would want to see: denied claims abandoned, balances never pursued, underpayments never challenged. Contractual adjustments carry CO group codes on the remittance. Anything posted as an adjustment without a corresponding CO code deserves a second look. URL: https://vizora.co/glossary/contractual-adjustment ### Underpayment (also: payer underpayment; contract variance) An underpayment is a claim paid below the contracted allowed amount. Unlike a denial it produces no alert, posts cleanly, and closes the claim — which is why systematic underpayment can run for years without anyone noticing. Detection requires comparing every payment against a loaded fee schedule. Common causes are fee schedule updates the payer applied late or not at all, incorrect multiple-procedure reductions, and modifier-based reductions applied where the contract does not permit them. The recovery route is the contract, not the appeal process — you are asserting a payment variance, not disputing an adjudication decision, and payers generally have a defined variance process for it. URL: https://vizora.co/glossary/underpayment ### Allowed Amount (also: allowable; contracted rate) The allowed amount is the maximum a payer recognizes for a covered service under its contract with the provider. It sets the ceiling on total payment — payer portion plus patient responsibility — and the difference between billed charge and allowed amount becomes a contractual adjustment. Most commercial contracts express the allowed amount as a percentage of the Medicare Physician Fee Schedule for the relevant locality, which makes the CMS fee schedule lookup a practical negotiating tool. Out-of-network is where this breaks down: with no contract there is no agreed allowed amount, and the payer applies its own methodology — which is the mechanic underneath most surprise billing disputes. URL: https://vizora.co/glossary/allowed-amount ### Eligibility Verification (also: insurance verification; benefits verification; 270/271) Eligibility verification confirms a patient's active coverage, benefits, deductible status, copay, coinsurance and authorization requirements before the service is delivered. It runs electronically through the X12 270 inquiry and 271 response, and it prevents the largest single category of denials. Optum attributes 24.3% of denials to registration and eligibility errors — the largest denial category there is, and the one with the cheapest fix. Verifying that coverage is active is only half of it. The response also carries the deductible remaining, which determines what to collect at the desk, and plan-level authorization requirements, which determine whether the visit should proceed at all. URL: https://vizora.co/glossary/eligibility-verification ### Coordination of Benefits (also: COB; primary and secondary insurance) Coordination of benefits determines which payer is primary when a patient has more than one plan, and in what order the others pay. Billing the wrong payer first produces a denial that cannot be fixed by resubmission alone — the payers' own COB records must be corrected first. COB denials are among the most persistent because the correction lives outside the practice. Until the patient or the plan updates the record, every resubmission denies identically. For Medicare the governing concept is the Medicare Secondary Payer rules, which determine primacy based on employment status, employer size, and whether the claim relates to a work injury, accident or end-stage renal disease. URL: https://vizora.co/glossary/coordination-of-benefits ### Patient Responsibility (also: patient balance; copay coinsurance deductible) Patient responsibility is the portion of an allowed amount the patient owes: copay, coinsurance, deductible and non-covered charges. It is identified on the remittance by PR group codes, and it has become materially harder to collect as high-deductible plans have grown. Collection probability falls steeply with time and distance from the visit. Balances collected at or before the point of service are collected at a far higher rate than the same balance billed 30 days later. One widely repeated claim is worth flagging: patient responsibility is often said to exceed 30% of provider revenue. Kodiak Solutions' analysis puts it near 7.3% of net patient revenue. The figure matters, but not at the scale vendor marketing asserts. URL: https://vizora.co/glossary/patient-responsibility ### Out-of-Network (also: non-participating provider; OON billing) Out-of-network describes a provider with no contract with a patient's payer. Without a contracted allowed amount the payer applies its own reimbursement methodology, patient cost-sharing is higher, and federal No Surprises Act protections restrict what may be balance-billed in emergency and certain facility-based situations. Out-of-network claims usually require more documentation, are paid more slowly, and are far more likely to be paid directly to the patient rather than the provider — which turns a payer receivable into a patient receivable. Where the No Surprises Act applies, balance billing is prohibited and the dispute moves to independent dispute resolution between provider and payer, on a defined timeline. URL: https://vizora.co/glossary/out-of-network ### Credentialing (also: provider credentialing; payer enrollment; provider enrollment) Credentialing is the verification of a provider's qualifications by a payer, and enrollment is the resulting contract that permits billing under that plan. The process commonly takes 90 to 180 days, and claims for services delivered before the effective date are generally not payable. The financial exposure is front-loaded and easy to underestimate. A provider seeing patients while enrollment is pending is generating receivables that may never be collectible, depending on whether the payer permits retroactive effective dates. Most commercial credentialing runs through CAQH ProView, where a lapsed attestation silently stalls applications. Medicare enrollment runs through PECOS and carries its own revalidation cycle. URL: https://vizora.co/glossary/credentialing ### NPI (also: national provider identifier; NPI number) A National Provider Identifier is the 10-digit identifier required on all HIPAA standard transactions. Type 1 identifies an individual provider; Type 2 identifies an organization. Both usually appear on a claim — the rendering provider as Type 1, the billing entity as Type 2. NPI records are maintained in NPPES and are public. Stale records — an old practice address, a retired taxonomy code — are a quiet and frequent cause of enrollment failures and claim rejections, because payers validate against NPPES. The taxonomy code attached to an NPI declares specialty, and a mismatch between taxonomy and the services billed will trigger denials on some payer edit sets. URL: https://vizora.co/glossary/npi ### HIPAA (also: HIPAA compliance; protected health information; PHI) HIPAA is the federal law governing the privacy and security of protected health information. For billing it establishes three obligations: the standard electronic transaction formats, the Privacy Rule limiting use and disclosure of PHI, and the Security Rule requiring safeguards for electronic PHI. A billing company is a business associate, not a covered entity, and may use PHI only as the Business Associate Agreement permits. That agreement is not a formality — it is the instrument that defines and limits what your vendor may do with your patients' data. The Security Rule requires an actual risk analysis, not a checklist. Ask any prospective vendor when theirs was last performed and by whom. URL: https://vizora.co/glossary/hipaa ### Business Associate Agreement (also: BAA; HIPAA BAA) A Business Associate Agreement is the HIPAA-required contract between a covered entity and a vendor handling protected health information on its behalf. It defines permitted uses, mandates safeguards, sets breach notification obligations, and governs return or destruction of PHI when the relationship ends. Engaging a billing company without an executed BAA is itself a HIPAA violation, independent of whether anything goes wrong. HHS publishes sample BAA provisions. Comparing a vendor's BAA against that baseline is a fast way to spot narrowed breach notification windows or carved-out subcontractor obligations. URL: https://vizora.co/glossary/business-associate-agreement ### Minimum Necessary (also: minimum necessary standard) The minimum necessary standard requires that uses and disclosures of protected health information be limited to the least amount needed to accomplish the purpose. It applies directly to billing operations, where the temptation to move whole charts rather than the relevant documentation is constant. In practice this shapes system access: a biller working denials for one payer does not need read access to every chart in the practice, and role-based access control is how the standard is actually met. It does not apply to disclosures for treatment, or to disclosures required by law — but it does apply to payment and operations, which is nearly everything billing does. URL: https://vizora.co/glossary/minimum-necessary --- ## Comparisons ### In-House vs Outsourced Medical Billing Question: Should a practice keep billing in-house or outsource it? Answer: In-house billing gives you direct control and fixed cost, but concentrates risk in one or two people and rarely justifies specialist coding expertise below about six providers. Outsourcing converts billing to a variable cost that scales with collections and removes key-person risk, at the cost of daily proximity. The comparison is usually framed as a percentage — a billing company charging 4 to 8% of collections versus a salaried biller — and framed that way, in-house almost always looks cheaper. The framing is wrong, because it compares a fully loaded external cost against a partially loaded internal one. A single medical biller's fully loaded cost runs near $73,000 a year once employer taxes, benefits and paid leave are included, using Bureau of Labor Statistics occupational wage and compensation data. That figure excludes clearinghouse fees, practice management software seats, coding reference subscriptions, continuing education, recruiting, and the cost of the weeks when that person is on leave and nothing is being submitted. The more useful question is not which is cheaper per dollar collected. It is which produces a higher net collection rate — because a two-point difference in net collection rate on $2 million in charges is $40,000, which dwarfs the fee difference in either direction. - Cost structure — In-house billing: Fixed — salary and benefits regardless of collections | Outsourced billing: Variable — a percentage of what is actually collected - Fully loaded annual cost — In-house billing: ~$73,000 per biller (BLS wage + benefits data) | Outsourced billing: 3–6% of net collections at Vizora - Cost when volume drops — In-house billing: Unchanged | Outsourced billing: Falls proportionally - Coverage during leave or turnover — In-house billing: Collections stop or slow | Outsourced billing: Team coverage, no single point of failure - Specialty coding depth — In-house billing: Limited to what your hires know | Outsourced billing: Access to certified coders across specialties - Day-to-day proximity — In-house billing: Down the hall, immediate context | Outsourced billing: Scheduled contact, defined escalation - Control over process — In-house billing: Complete | Outsourced billing: Contractual — you set expectations, not steps - Patient-facing billing questions — In-house billing: Handled by staff who know the patients | Outsourced billing: Handled by a service, quality varies by vendor - Denial appeal capacity — In-house billing: Constrained by one person's available hours | Outsourced billing: Scales with volume - Reporting and benchmarking — In-house billing: Whatever your PM system produces | Outsourced billing: Usually stronger, but verify before signing - Data and access control — In-house billing: Internal, no BAA needed | Outsourced billing: Requires a Business Associate Agreement and vendor diligence - Switching cost — In-house billing: High — rehiring and retraining | Outsourced billing: Moderate — contract notice period and data migration Keep billing in-house when: - You have six or more providers and enough volume to employ a dedicated, credentialed coder rather than a generalist. - Your specialty is narrow and stable, so institutional knowledge compounds rather than needing constant breadth. - You already run a clean claim rate above 95% and days in AR under 35 — a working system is not worth disrupting. - Patient billing conversations are a meaningful part of your patient relationship and you want them handled in-house. Outsource when: - Collections depend on one person, and their absence stops cash flow. - Your denial rate is above 10% or AR beyond 90 days is climbing, and nobody has the hours to work the queue. - You are adding providers or locations and billing capacity is the constraint. - You bill multiple specialties, or a specialty with genuinely difficult coding — anesthesia time units, mental health authorization limits, surgical global periods. - You cannot answer, from a report, what your first-pass denial rate was last month. When this is not the right answer: If you have a strong biller, a denial rate under 8% and AR under 35 days, outsourcing will most likely not improve your numbers — and we will tell you that after the audit rather than after the contract. The practices that gain most from outsourcing are the ones whose current system is failing quietly, not the ones already running well. URL: https://vizora.co/compare/in-house-vs-outsourced-medical-billing ### Medical Billing vs Medical Coding Question: What is the difference between medical billing and medical coding? Answer: Medical coding translates clinical documentation into standardized CPT, ICD-10-CM and HCPCS codes. Medical billing takes those codes and turns them into a submitted, adjudicated and collected claim. Coding determines what you are entitled to bill; billing determines whether you actually receive it. The two are routinely spoken of as one job, and in small practices one person often does both. They are nonetheless distinct disciplines with different credentials, different failure modes and different economics. Coding is a documentation discipline. The coder reads the note and answers two questions: what was done, and why. Getting that wrong produces denials that look clinical — medical necessity, bundling, level-of-service downcoding — and exposes the practice to audit risk in both directions. Billing is an operations discipline. The biller answers whether the claim reached the payer, in the required format, within the filing window, against active coverage, with any required authorization attached — and if it was refused, whether anyone appealed. Getting that wrong produces denials that look administrative and are almost entirely preventable. - Core question answered — Medical coding: What was done, and why? | Medical billing: Did we get paid for it? - Primary inputs — Medical coding: Clinical documentation, the chart note | Medical billing: Coded claim, payer rules, remittance advice - Outputs — Medical coding: CPT, ICD-10-CM, HCPCS codes and modifiers | Medical billing: Submitted claims, appeals, posted payments, patient statements - Typical credentials — Medical coding: CPC, CCS, CIC, RHIT (AAPC / AHIMA) | Medical billing: CPB, or experience-based - Governing references — Medical coding: CPT, ICD-10-CM guidelines, NCCI edits, LCD/NCD policy | Medical billing: Payer contracts, filing deadlines, X12 transaction standards - Characteristic failure — Medical coding: Medical necessity and bundling denials, under- or over-coding | Medical billing: Timely filing, eligibility and authorization denials, unworked AR - Revenue impact when wrong — Medical coding: Silent — undercoding never generates an alert | Medical billing: Visible — denials and aging appear in reports - Audit exposure — Medical coding: High — coding patterns are profiled by payers | Medical billing: Lower, but includes patient-billing compliance Your problem is coding when: - Denials cluster on medical necessity, bundling or level of service. - Your E/M level distribution sits well below specialty benchmarks. - Denials spike each January or October, when CPT and ICD-10-CM update. - Modifier use is inconsistent between providers doing the same procedure. Your problem is billing when: - Denials cluster on eligibility, registration, authorization or timely filing. - AR beyond 90 days is growing while denial rate looks acceptable. - Nobody reads clearinghouse rejection reports daily. - Appeals are filed only for large-dollar claims because there is no capacity for the rest. When this is not the right answer: Most practices that ask this question have a coding problem being described as a billing problem, or the reverse. Before hiring for either, pull last quarter's denials, group them by CARC, and see which side of the line they fall on. That single exercise usually answers the staffing question outright. URL: https://vizora.co/compare/medical-billing-vs-medical-coding ### Percentage of Collections vs Flat Fee Billing Question: Should a billing company charge a percentage of collections or a flat fee? Answer: Percentage-of-collections pricing charges a share of what is actually collected, typically 4 to 8%, so the vendor earns nothing on revenue it fails to recover. Flat-fee pricing charges a set amount per claim regardless of outcome, which is cheaper at high volume and low claim value but removes the incentive to chase difficult claims. The distinction that matters is not price. It is what the vendor is paid for. Under percentage pricing, a denied claim that is never appealed costs the vendor money. Under flat-fee pricing, a denied claim that is never appealed costs the vendor nothing — the fee was earned on submission. Roughly 70% of appealed denials are overturned, so the appeals backlog is exactly where the incentive difference shows up in your bank account. That is an argument about alignment, not honesty. Good vendors work denials under either model. But contracts should be read on the assumption that incentives eventually win, because they usually do. - How it is charged — Percentage of collections: A share of net collections, commonly 4–8% | Flat fee per claim: A fixed amount per claim submitted - Vendor paid when a claim is denied and abandoned — Percentage of collections: No | Flat fee per claim: Yes - Incentive to appeal — Percentage of collections: Direct and proportional | Flat fee per claim: None built in - Cost predictability — Percentage of collections: Varies with collections | Flat fee per claim: Predictable per claim - Cheaper at high volume, low value per claim — Percentage of collections: No | Flat fee per claim: Yes - Cheaper at low volume, high value per claim — Percentage of collections: Yes | Flat fee per claim: No - Cost during a slow month — Percentage of collections: Falls with collections | Flat fee per claim: Unchanged if claim count holds - Risk of vendor cherry-picking easy claims — Percentage of collections: Low | Flat fee per claim: Higher - Suits high-deductible, patient-heavy revenue — Percentage of collections: Watch how patient payments are treated | Flat fee per claim: Neutral - Transparency of what you are buying — Percentage of collections: Requires a clear definition of net collections | Flat fee per claim: Simple to audit Percentage of collections suits you when: - Your average claim value is moderate to high and volume is not extreme. - You have an aged AR or denial backlog you want actually worked, not just submitted. - You want billing cost to fall automatically when volume falls — a seasonal or growing practice. - You would rather pay more on a recovered claim than pay anything on an abandoned one. Flat fee suits you when: - You bill very high volumes of low-value claims, where a percentage would exceed reasonable per-claim economics. - Your denial rate is already low and appeals volume is minimal. - You need a fixed, budgetable line item and can accept the incentive trade-off. - You retain denial and appeal work in-house and are buying submission capacity only. When this is not the right answer: Under either model, read the definition of what is billable before the rate. A percentage applied to gross charges rather than net collections is a materially different deal at the same headline number. Ask specifically whether patient payments, capitation, refunds, and payments on claims submitted before the contract started are included — that is where the surprises live. Vizora charges a percentage of net collections starting at 3%, and does not bill separately for denial appeals. URL: https://vizora.co/compare/percentage-of-collections-vs-flat-fee-billing ### Offshore vs Domestic Medical Billing Question: Is offshore medical billing safe, and how does it compare to domestic? Answer: Offshore billing is substantially cheaper and can be fully HIPAA-compliant, since HIPAA imposes no geographic restriction — but it requires stricter vendor diligence and subcontractor disclosure. Domestic billing costs more and typically brings closer payer familiarity and better patient-facing interaction, particularly for phone-based collections. HIPAA does not prohibit offshore processing of protected health information. What it requires is that the business associate safeguard it and that subcontractors be bound by equivalent obligations, wherever they sit. The practical difficulty is not legality; it is enforceability and visibility. The question most practices should actually ask is not offshore or domestic. It is whether they know where the work happens at all. A meaningful share of US-branded billing companies subcontract offshore without saying so, which means the choice has often already been made for you and is not in the contract you signed. State law is a real constraint here and varies. Some states impose additional requirements on offshore handling of health data, and some payer contracts restrict it independently of state law. - Cost — Offshore: Materially lower | Domestic (US-based): Higher - HIPAA permissibility — Offshore: Permitted; requires equivalent safeguards and BAA flow-down | Domestic (US-based): Permitted - Enforceability of a data breach remedy — Offshore: Harder across jurisdictions | Domestic (US-based): Straightforward - State law and payer contract constraints — Offshore: Varies — check both | Domestic (US-based): Generally unrestricted - Familiarity with regional payer behaviour — Offshore: Varies widely by vendor | Domestic (US-based): Typically stronger - Patient-facing phone interaction — Offshore: Often the weakest point | Domestic (US-based): Typically stronger - Coverage hours — Offshore: Overnight processing is a genuine advantage | Domestic (US-based): Business hours - Scalability at short notice — Offshore: High | Domestic (US-based): Moderate - Transparency about who touches PHI — Offshore: Depends entirely on the contract | Domestic (US-based): Depends entirely on the contract Offshore can work well when: - The work is high-volume, rules-based processing — charge entry, claim status follow-up, payment posting. - The vendor names its processing locations and subcontractors in the contract. - Access is role-based and auditable, and you can see the audit log. - Patient-facing communication stays domestic or in-house. Domestic is the safer default when: - Your state law or a payer contract restricts offshore handling of PHI. - Patient collections involve significant phone contact. - Your specialty needs deep familiarity with a specific MAC's local coverage determinations. - You want breach remedies you can realistically enforce. When this is not the right answer: The diligence questions that matter are identical either way: where is PHI stored, who has access, are subcontractors disclosed and bound, when was the last security risk analysis, and what does the BAA say about breach notification timing. A domestic vendor that cannot answer those is a worse choice than an offshore vendor that can. URL: https://vizora.co/compare/offshore-vs-domestic-medical-billing ### Medical Billing Software vs a Billing Service Question: Do I need better billing software or a billing service? Answer: Software fixes workflow and visibility problems — it will scrub claims, surface denials and produce reports. It will not work a queue. A billing service fixes capacity problems: someone appealing denials, chasing payers and following up on aged AR. Buying software to solve a capacity problem is the most common and most expensive mistake here. There is a straightforward diagnostic. Look at your denials from last quarter. If most were identified but never worked, you have a capacity problem and software will not touch it. If most were never identified at all, you have a visibility problem and better software may genuinely solve it. Practices frequently buy a platform migration — six figures and nine months of disruption — to solve what was an unstaffed appeals queue. The new system surfaces the same denials more attractively, and they go unworked in a nicer interface. The reverse mistake also happens: hiring a service on top of a practice management system so poor that the service spends its hours fighting the tooling rather than the payers. - What it actually provides — Billing software: Tooling and visibility | Billing service: Labour and expertise - Works your denial queue — Billing software: No | Billing service: Yes - Files appeals — Billing software: No | Billing service: Yes - Improves claim scrubbing — Billing software: Yes | Billing service: Yes, via its own tooling - Cost shape — Billing software: Per-seat or per-provider subscription | Billing service: Percentage of collections or per claim - Time to benefit — Billing software: Months — implementation and retraining | Billing service: Under 2 weeks typically - Scales with provider count — Billing software: Cost rises per seat | Billing service: Cost rises with collections - Survives your biller resigning — Billing software: No | Billing service: Yes - You keep direct control of process — Billing software: Yes | Billing service: Contractual Buy or change software when: - You cannot produce first-pass denial rate by payer from your current system. - Denials are being discovered late because nothing surfaces them. - Your staff spend meaningful time on manual re-keying between systems. - Clearinghouse rejections are not visible in a daily worklist. Buy a service when: - Your denials are visible and still not worked. - AR beyond 90 days is growing while everyone is busy. - One person's leave stops collections. - You need specialty coding depth you cannot justify hiring for. When this is not the right answer: If your reporting is genuinely broken, fix that before hiring anyone — including us. A service operating inside a system that cannot report denial reasons will improve your collections and still leave you unable to verify it. Reporting you can trust is what makes any of this measurable. URL: https://vizora.co/compare/billing-software-vs-billing-service ### Denial Management vs Denial Prevention Question: Is it better to prevent denials or get better at appealing them? Answer: Prevention stops denials before submission through eligibility checks, authorization tracking and claim scrubbing — it is far cheaper per claim and addresses the 84% of denials Optum finds potentially avoidable. Management recovers denials that already happened through appeals, where roughly 70% are overturned. A practice with a backlog needs management first and prevention immediately after. These are usually presented as alternatives and are actually a sequence. The order is determined by cash, not philosophy. Prevention has the better unit economics and no upper bound on how much it helps, but it only affects claims not yet submitted. If you have 90 days of denied claims sitting unworked, prevention returns nothing on them, and every week that passes moves some of them past appeal deadlines permanently. So: work the backlog to recover what is still recoverable, and build prevention in parallel so the backlog does not rebuild. Running only the first is a treadmill. Running only the second concedes revenue that was collectible. - Acts on — Denial prevention: Claims not yet submitted | Denial management: Claims already denied - Cost per claim addressed — Denial prevention: Minutes of front-end work | Denial management: $57.23 average to contest (Premier, 2023) - Recovers existing lost revenue — Denial prevention: No | Denial management: Yes - Ceiling on impact — Denial prevention: 84% of denials are potentially avoidable (Optum) | Denial management: ~70% of appealed denials are overturned - Time to visible result — Denial prevention: 30–60 days as new claims cycle | Denial management: Immediate as appeals resolve - Main levers — Denial prevention: Eligibility, authorization, scrubbing, coding review | Denial management: CARC/RARC triage, appeal letters, payer escalation - Fails when — Denial prevention: Front desk is undertrained or understaffed | Denial management: Appeal deadlines pass unworked - Compounds over time — Denial prevention: Yes | Denial management: No — it is remedial by nature Prioritise prevention when: - Denials cluster on eligibility, registration or authorization — the categories that should never happen. - Your appeal backlog is already current. - The same CARC appears repeatedly across the same payer. - You are adding volume and want the denial count not to scale with it. Prioritise management when: - You have unworked denials approaching appeal deadlines. - AR beyond 90 days is a material share of total AR. - Denials are being written off as contractual adjustments rather than appealed. - Cash flow needs to improve inside a quarter. When this is not the right answer: One qualifier on the widely quoted prevention numbers: the 84% avoidability figure comes from hospital claim remits, not physician practices, and the mix differs. The direction is sound and the order of magnitude is right, but a solo practice should not expect hospital-scale denial economics to map exactly onto its own. URL: https://vizora.co/compare/denial-management-vs-denial-prevention ### athenahealth RCM vs an Outsourced Billing Service Question: Should billing come from the EHR vendor or from an independent billing company? Answer: Platform vendors such as athenahealth bundle EHR, practice management and revenue cycle into one product, which means tight data integration and a single vendor relationship — but billing is generally coupled to the clinical software. An independent billing service works inside whatever system you already run, so billing can be changed without replacing the systems your clinicians use daily. Confirm with any vendor whether their RCM can be purchased separately, because that answer determines the whole comparison. This is not really a comparison of two billing companies. It is a comparison of two structures, and the structural difference matters more than any feature list. In the platform model, the same vendor supplies the software your clinicians document in and the service that collects your money. Data moves between them without an interface, and there is one contract and one number to call. In the independent model, billing is a service layered onto the practice management system you already run. You manage two relationships instead of one, and you gain the ability to change either without disturbing the other. Which is better depends almost entirely on one question: how confident are you that you want the same vendor for the next decade? - What you are buying — Platform RCM (EHR vendor): EHR, practice management and RCM as one product | Independent billing service: Billing and revenue cycle only, on your existing system - Clinical software — Platform RCM (EHR vendor): Typically the vendor's own EHR; confirm whether RCM is available separately | Independent billing service: Whatever you already run; unchanged - Data integration — Platform RCM (EHR vendor): Native — no interface between chart and claim | Independent billing service: Works within your PM system; no new interface, but two vendors - Vendor relationships — Platform RCM (EHR vendor): One | Independent billing service: Two — your PM/EHR and your biller - Cost of changing billers — Platform RCM (EHR vendor): Higher where billing is coupled to the platform contract | Independent billing service: Moderate — notice period, clinical systems untouched - Cost of changing EHR — Platform RCM (EHR vendor): High — billing moves with it | Independent billing service: Independent of billing - Pricing model — Platform RCM (EHR vendor): Typically a percentage of collections; confirm current terms directly | Independent billing service: Percentage of net collections, 3–6% at Vizora - Payer rules and edits — Platform RCM (EHR vendor): Large national rules engine, a genuine strength of scale | Independent billing service: Payer-specific and NCCI edits, plus regional payer knowledge - Specialty coding depth — Platform RCM (EHR vendor): Broad; depth varies by specialty | Independent billing service: Specialty-assigned certified coders - Denial appeal capacity — Platform RCM (EHR vendor): Scales with the platform | Independent billing service: Scales with the service; ask for appeal rate, not denial rate - Best-fit practice size — Platform RCM (EHR vendor): Varies by vendor and tier; confirm fit for your size | Independent billing service: Solo through mid-size groups - Implementation burden — Platform RCM (EHR vendor): Significant — a platform migration touches clinical workflow | Independent billing service: Lower — billing changes, clinical workflow does not Choose platform RCM when: - You are replacing your EHR anyway, so the migration cost is already being paid. - You want a single vendor accountable end to end, and you value that more than the ability to change one piece. - You are a larger group with the administrative capacity to run a platform implementation properly. - Native chart-to-claim data flow matters more to you than system independence. Choose an independent billing service when: - Your clinicians are productive in your current EHR and you do not want to retrain them to fix a billing problem. - You want billing performance to be contestable — if it underperforms, you can change it without a clinical migration. - You bill a specialty where coding depth matters more than platform breadth. - You want to solve collections now rather than after a multi-month platform implementation. When this is not the right answer: If you are already committed to a platform and happy with the clinical side, moving billing out is often not worth the friction — the integration you would give up is real. And a large platform's payer rules engine is a genuine advantage of scale that an independent service matches through specialisation rather than volume. The case for an independent biller is strongest when your clinical systems are fine and only collections are failing. URL: https://vizora.co/compare/athenahealth-vs-outsourced-billing-service ### Tebra vs an Outsourced Billing Service Question: Is an all-in-one small-practice platform or a dedicated billing service better for collections? Answer: All-in-one platforms aimed at independent practices, Tebra among them, combine practice management, EHR and patient-growth tools in a single product. A dedicated billing service does only revenue cycle. The trade-off is breadth against depth: one vendor covering many needs adequately, or one function done by specialists. Confirm what billing support a given platform actually provides — software, a managed service, or both. Small practices are the hardest segment to serve well, because they need the same functions a large group needs with a fraction of the administrative staff to run them. That is the gap all-in-one platforms are built to close, and they close a real one. The question is what happens when a practice's problem is specifically collections. Breadth is valuable when many things are mediocre. It is less valuable when nine things are fine and one thing — the denial queue, the aged AR, the underpayments nobody is checking — is quietly costing more than everything else combined. Optum's index of 124 million claim remits found 84% of denials are potentially avoidable and 44% originate at the front end. Fixing that is specialist work, and it is the work most likely to be deprioritised when the same team is also responsible for scheduling, patient messaging and web presence. - Scope — All-in-one practice platform: Practice management, EHR, patient growth tools, and billing in some form | Dedicated billing service: Revenue cycle only - Vendor count — All-in-one practice platform: One | Dedicated billing service: Two — your PM system and your biller - Best when — All-in-one practice platform: Several functions need improving at once | Dedicated billing service: Collections specifically are underperforming - Coding expertise — All-in-one practice platform: Available; depth varies by specialty | Dedicated billing service: Specialty-assigned certified coders - Denial and appeal work — All-in-one practice platform: Part of a broader service offering | Dedicated billing service: The core of the engagement - Aged AR recovery — All-in-one practice platform: Confirm scope explicitly before signing | Dedicated billing service: Typically in scope; confirm whether backlog is separate - Clinical software change required — All-in-one practice platform: Yes, to use the platform fully | Dedicated billing service: No - Patient-facing tools — All-in-one practice platform: Commonly included — scheduling, reminders, reputation | Dedicated billing service: Not included - Pricing model — All-in-one practice platform: Subscription plus billing fees; confirm current terms directly | Dedicated billing service: Percentage of net collections, 3–6% at Vizora - Practice size fit — All-in-one practice platform: Solo and small independent practices | Dedicated billing service: Solo through mid-size groups Choose the all-in-one platform when: - You need scheduling, charting, patient communication and billing, and you do not have staff to manage several vendors. - Your practice is starting up and wants one decision rather than four. - Patient acquisition and online presence are as pressing as collections. - Your billing is roughly fine and consolidating vendors is the actual goal. Choose a dedicated billing service when: - Your denial rate is above 10%, or AR past 90 days is growing. - Nobody in the practice can tell you last month's first-pass denial rate from a report. - Your specialty has genuinely difficult coding — anesthesia time units, surgical global periods, behavioural health authorisation limits. - Appeals are not being filed because nobody has the hours, not because the claims lack merit. - You are content with your clinical software and only want the money side fixed. When this is not the right answer: If your practice needs a practice management system, an EHR and patient communication tools as well as billing, an all-in-one platform will serve you better than we will — we do not provide any of those, and stitching four specialist vendors together is a real administrative burden for a small practice. Our case is strongest when your systems are already in place and collections are the specific thing failing. URL: https://vizora.co/compare/tebra-vs-outsourced-billing-service ### AdvancedMD RCM vs an Outsourced Billing Service Question: Should revenue cycle come bundled with the practice management suite or be bought separately? Answer: Suite vendors such as AdvancedMD sell practice management, EHR and revenue cycle as parts of one product family, so billing is typically procured alongside the software. An independent billing service is bought separately and measured separately — which means it can be replaced on its performance alone, without touching the systems your clinicians use. Ask any suite vendor whether RCM can be contracted independently; where it can, much of the difference below narrows. Bundling is a real convenience and it is worth naming honestly: one contract, one implementation, one support number, and no argument between vendors about whose problem a given failure is. The cost of bundling is separability. When billing and software are the same purchase, underperforming billing is expensive to fix, because fixing it means unpicking the software too. That cost is invisible on day one and becomes the whole story in year three. So the question is not which vendor is better. It is whether you want billing performance to be a decision you can revisit cheaply. - Procurement — Bundled suite RCM: Typically one contract covering software and service; confirm whether they can be separated | Independent billing service: Separate from your software contract - Accountability when collections underperform — Bundled suite RCM: Same vendor supplies the tool and the service | Independent billing service: Isolated — the service is measurable on its own - Cost of replacing the biller — Bundled suite RCM: Higher where the service is contracted with the software | Independent billing service: Notice period; clinical systems untouched - Implementation — Bundled suite RCM: One project, but a larger one | Independent billing service: Billing only — clinical workflow unchanged - Support model — Bundled suite RCM: Single vendor, single escalation path | Independent billing service: Two vendors, two escalation paths - Pricing — Bundled suite RCM: Subscription plus RCM fees; confirm current terms directly | Independent billing service: Percentage of net collections, 3–6% at Vizora - Specialty coding depth — Bundled suite RCM: Available; depth varies by specialty | Independent billing service: Specialty-assigned certified coders - Aged AR recovery — Bundled suite RCM: Confirm whether backlog is in scope | Independent billing service: Confirm whether backlog is scoped separately - Reporting — Bundled suite RCM: Native to the suite | Independent billing service: Provided by the service; verify depth before signing - Best-fit practice — Bundled suite RCM: Practices buying software and billing at the same time | Independent billing service: Practices whose software is settled and collections are not Choose the bundled suite when: - You are replacing practice management software anyway and want one project rather than two. - Administrative capacity is your constraint and reducing vendor count genuinely helps. - You want one escalation path when something breaks, and will trade separability for it. - Native reporting across scheduling, charting and billing matters to how you run the practice. Choose an independent billing service when: - Your practice management system is working and you do not want to replace it to fix collections. - You want billing measured on its own numbers — first-pass denial rate, days in AR, appeal rate — and replaceable on them. - Your specialty coding is genuinely difficult and depth matters more than breadth. - You have an aged AR backlog that needs dedicated attention now, not after an implementation. When this is not the right answer: If you are buying practice management software regardless, bundling RCM with it is a reasonable decision and we are not a substitute for the software half — we do not sell one. Our argument only applies once your systems are settled. A practice mid-way through choosing an EHR should finish that decision first. URL: https://vizora.co/compare/advancedmd-vs-outsourced-billing-service ### CareCloud RCM vs an Outsourced Billing Service Question: Is platform-attached revenue cycle or a standalone billing service the better fit? Answer: Vendors such as CareCloud offer practice management, EHR and revenue cycle services as an integrated set, though several also sell RCM to practices running other systems. A standalone billing service provides revenue cycle only, working inside your existing systems. The right choice follows from a single diagnostic: whether your problem is that your systems are inadequate, or that your collections are. Practices usually arrive at this comparison having noticed a number they do not like — a denial rate, an AR figure, a collection ratio — and then start evaluating vendors of quite different kinds against each other. That is worth separating before shortlisting. Replacing a platform solves a systems problem. Replacing a biller solves a collections problem. They cost different amounts, take different lengths of time, and disrupt different people. If your clinicians are productive and your reporting is adequate, a platform migration is a large amount of disruption aimed at a target it does not sit on. - Scope — Platform-attached RCM: Practice management, EHR and revenue cycle, sold together or separately | Standalone billing service: Revenue cycle only - Solves — Platform-attached RCM: A systems problem | Standalone billing service: A collections problem - Disruption to clinicians — Platform-attached RCM: Significant — a platform migration changes daily workflow | Standalone billing service: Minimal — clinical workflow is untouched - Time to effect — Platform-attached RCM: Months, following implementation | Standalone billing service: Weeks — typically under 2 from agreement to first claim - Vendor count — Platform-attached RCM: One | Standalone billing service: Two - Pricing — Platform-attached RCM: Subscription plus RCM fees; confirm current terms directly | Standalone billing service: Percentage of net collections, 3–6% at Vizora - Specialty coding depth — Platform-attached RCM: Available; varies by specialty | Standalone billing service: Specialty-assigned certified coders - If it underperforms — Platform-attached RCM: Changing it means changing systems | Standalone billing service: Changing it means a notice period - Data ownership on exit — Platform-attached RCM: Confirm export terms before signing | Standalone billing service: Confirm export terms before signing Choose platform-attached RCM when: - Your practice management system or EHR is genuinely inadequate and needs replacing regardless. - You want one vendor accountable across clinical and financial operations. - You are consolidating several tools and reducing vendor count is itself the goal. Choose a standalone billing service when: - Your systems are adequate and collections are the specific thing failing. - You need improvement in weeks rather than after an implementation cycle. - You want to keep the ability to change billers without changing clinical software. - You have aged AR that needs working now, before timely filing closes on it. When this is not the right answer: If your practice management system is genuinely holding you back — no usable reporting, no electronic eligibility, no claim scrubbing — then a billing service layered on top inherits those constraints, and a platform change is the more honest fix. We can work in most systems, but we cannot make a system produce data it does not capture. URL: https://vizora.co/compare/carecloud-vs-outsourced-billing-service --- ## Services ### Medical Billing & Coding Medical billing is the process of translating care delivered into coded claims, submitting them to payers, and pursuing payment until the balance is resolved. Vizora handles that end to end — coding, scrubbing, submission, payer follow-up, payment posting and denial rework — so your staff never touches a claim. Included: Certified coding; Clean claim submission; Payer follow-up; Payment posting; Denial rework; Monthly reporting URL: https://vizora.co/services/medical-billing ### Medical Coding Medical coding converts documented clinical care into the ICD-10, CPT and HCPCS codes payers reimburse against. Coding errors cause underpayment as often as denial. Vizora's certified coders assign codes to specialty standards and audit their own work before submission. Included: ICD-10-CM diagnosis coding; CPT & HCPCS procedure coding; Modifier management; E/M level validation; Quality audits; Documentation feedback URL: https://vizora.co/services/medical-coding ### Revenue Cycle Management Revenue cycle management is the end-to-end financial process running from patient registration through final payment. RCM covers eligibility, charge capture, coding, claim submission, payment posting, denial management and AR follow-up. Vizora operates the entire cycle so revenue is managed as one system rather than disconnected tasks. Included: Patient access; Charge capture; Claims management; Payment & collections; Denial prevention; Reporting & analytics URL: https://vizora.co/services/revenue-cycle-management ### Claims Management Claims management covers everything between a coded encounter and an adjudicated payment: scrubbing against payer edits, electronic submission, status tracking, and rapid correction of rejections. Catching an error before submission costs a fraction of reworking a denial after it. Included: Pre-submission scrubbing; Electronic submission; Real-time monitoring; Rapid error resolution; Performance analytics; Process optimization URL: https://vizora.co/services/claims-management ### Denial Management Denial management is the process of analyzing why claims are denied, appealing those that should be paid, and fixing the upstream cause so they stop recurring. It matters more than most practices realize: MGMA reports 50–65% of denied claims are never reworked at all, which means the revenue is simply written off. Included: Denial analytics; Root-cause analysis; Appeal preparation; Deadline tracking; Prevention feedback; Recovery reporting URL: https://vizora.co/services/denial-management ### AR Management Accounts receivable management is the systematic pursuit of claims that have been submitted but not paid. AR value decays with age — claims past 90 days collect at a fraction of fresh claims, and past the payer's filing deadline they collect at zero. Vizora works your aging inventory by recovery priority. Included: Aging AR analysis; Dedicated follow-up team; Systematic outreach; Payer escalation; Appeals management; Recovery analytics URL: https://vizora.co/services/ar-management ### Eligibility Verification Eligibility verification confirms a patient's coverage is active and establishes their financial responsibility before the visit. It is the cheapest denial prevention available: eligibility and registration errors are among the largest categories of avoidable denial, and every one is preventable at the front desk. Included: Real-time verification; Benefits breakdown; Authorization flags; Patient responsibility; Coordination of benefits; Batch pre-checks URL: https://vizora.co/services/eligibility-verification ### Prior Authorization Prior authorization is payer approval obtained before a service is delivered. When it is missed, the claim denies after the care has already been provided — the worst possible outcome, since the cost is sunk. Vizora manages authorization requests, follow-up and appeals end to end. Included: Request initiation; Active follow-up; Real-time tracking; Criteria expertise; Peer-to-peer coordination; Denial appeals URL: https://vizora.co/services/prior-authorization ### Provider Credentialing Credentialing is the process of enrolling a provider with insurance networks so their services can be billed. Until it completes, a provider generates cost but no billable revenue. Vizora manages applications, primary source verification, CAQH maintenance and re-credentialing so revenue starts as early as possible. Included: Application management; Primary source verification; CAQH maintenance; Payer follow-up; Re-credentialing; Status reporting URL: https://vizora.co/services/credentialing ### Patient Collections Patient responsibility has grown steadily with high-deductible plans, making patient balances a material share of practice revenue. Collecting them well requires a different approach than payer follow-up — clear statements, flexible payment options, and communication that preserves the clinical relationship. Included: Clear statements; Multi-channel outreach; Flexible payment plans; Online payment; Point-of-service collection; Compliant communication URL: https://vizora.co/services/patient-collections ### Patient Support Billing questions are among the most common reasons patients call a practice, and each call pulls staff away from clinical work. Vizora's support team answers billing inquiries directly — explaining coverage, resolving disputes and setting up payment — with full access to claim detail. Included: Extended-hours coverage; Multi-channel access; Claim-level detail; HIPAA-compliant handling; Payment handling; Complete logging URL: https://vizora.co/services/patient-support ### Practice Analytics Practice analytics turns revenue cycle data into decisions. The metrics that matter are net collection ratio, first-pass clean claim rate, days in AR, denial rate by reason and payer, and cost to collect. Vizora delivers those continuously, benchmarked, with the analysis needed to act on them. Included: Live dashboards; Denial analytics; Payer performance; Trend analysis; Benchmarking; Actionable recommendations URL: https://vizora.co/services/practice-analytics --- ## Specialties ### Cardiology Cardiology billing is complicated by global periods on interventional procedures, the technical/professional split on diagnostics, and device monitoring codes billed on fixed calendar intervals. Most cardiology revenue leakage traces to component billing errors and prior authorization on interventional work rather than to coding of the procedure itself. Common codes: 93000 (Electrocardiogram, complete with interpretation and report); 93306 (Transthoracic echocardiography, complete with Doppler and color flow); 93458 (Left heart catheterization with coronary angiography); 92928 (Percutaneous coronary intervention with stent placement, single vessel); 93015 (Cardiovascular stress test, complete with supervision and interpretation); 93297 (Implantable cardiovascular monitor interrogation, 30-day remote) Characteristic denials: Component billing errors; Global period bundling; Missing prior authorization; Monitoring interval violations; Medical necessity on diagnostics URL: https://vizora.co/specialties/cardiology ### Dermatology Dermatology billing turns on two distinctions payers scrutinize heavily: medical versus cosmetic intent, and lesion counts and measurements that determine code selection. Because dermatology is high-volume with relatively low per-claim value, small systematic coding errors compound into substantial revenue loss quickly. Common codes: 11102 (Tangential biopsy of skin, single lesion); 11104 (Punch biopsy of skin, single lesion); 17000 (Destruction of premalignant lesion, first lesion); 11602 (Excision of malignant lesion, trunk/arm/leg, 1.1–2.0 cm); 17311 (Mohs micrographic surgery, first stage, up to 5 blocks); 88305 (Surgical pathology, gross and microscopic examination) Characteristic denials: Cosmetic determination; Lesion measurement missing; Add-on code sequencing; Modifier 59 misuse; Mohs documentation gaps URL: https://vizora.co/specialties/dermatology ### Orthopedics Orthopedic billing centers on surgical global periods, multiple-procedure reduction rules, and the split between surgical and conservative care. Because orthopedic procedures carry high per-claim values, a single systematic error — an unbundled arthroscopy component or a mishandled global period — has outsized revenue impact. Common codes: 29881 (Knee arthroscopy with medial or lateral meniscectomy); 27447 (Total knee arthroplasty); 20610 (Arthrocentesis or injection, major joint or bursa); 29827 (Shoulder arthroscopy with rotator cuff repair); 27130 (Total hip arthroplasty); 73721 (MRI, lower extremity joint, without contrast) Characteristic denials: Global period violations; Arthroscopy unbundling; Missing prior authorization; Modifier 50 conventions; Conservative care requirements URL: https://vizora.co/specialties/orthopedics ### Mental & Behavioral Health Behavioral health billing is defined by time-based psychotherapy codes, narrow payer panels, and credentialing delays that block new clinicians from billing for months. Because sessions are recurring and per-session value is modest, credentialing and authorization failures compound faster here than in almost any other specialty. Common codes: 90791 (Psychiatric diagnostic evaluation without medical services); 90834 (Psychotherapy, 45 minutes with patient); 90837 (Psychotherapy, 60 minutes with patient); 90853 (Group psychotherapy, other than family); 90847 (Family psychotherapy with patient present, 50 minutes); 90833 (Psychotherapy 30 minutes, add-on to evaluation and management) Characteristic denials: Time documentation gaps; Provider not credentialed; Carve-out misrouting; Authorization or session limits; Add-on code sequencing URL: https://vizora.co/specialties/mental-health ### OB-GYN OB-GYN billing is unusual because obstetric care is billed as a global package spanning roughly nine months, covering antepartum visits, delivery and postpartum care in a single code. When a patient transfers, changes coverage or delivers unexpectedly, that global package must be unbundled correctly or revenue is lost. Common codes: 59400 (Routine obstetric care including antepartum, vaginal delivery and postpartum care); 59510 (Routine obstetric care including antepartum, cesarean delivery and postpartum care); 59425 (Antepartum care only, 4–6 visits); 76805 (Obstetric ultrasound, after first trimester, complete); 58558 (Hysteroscopy with sampling or polypectomy); 57454 (Colposcopy of cervix with biopsy and endocervical curettage) Characteristic denials: Global package errors; Coverage changes mid-pregnancy; Preventive versus problem visits; Ultrasound frequency limits; Global surgical bundling URL: https://vizora.co/specialties/obgyn ### Pediatrics Pediatric billing is high-volume and low-margin, built on well-child visits, immunization administration and developmental screening. Immunization administration codes are among the most frequently underbilled services in medicine, because administration is billable separately from the vaccine product itself and is routinely omitted. Common codes: 99392 (Preventive medicine visit, established patient, ages 1–4); 99393 (Preventive medicine visit, established patient, ages 5–11); 90460 (Immunization administration with counseling, first component); 90461 (Immunization administration with counseling, each additional component); 96110 (Developmental screening with scoring and documented report); 96127 (Brief emotional or behavioral assessment with scoring and report) Characteristic denials: Administration codes omitted; Component counting errors; VFC product billing; Same-day visit conflicts; Screening documentation URL: https://vizora.co/specialties/pediatrics ### Family Medicine Family medicine billing spans preventive care, chronic disease management and acute visits, which means the coding surface is wide rather than deep. Most revenue leakage comes from under-documented evaluation and management levels and from chronic care management services that are delivered but never billed. Common codes: 99213 (Office visit, established patient, low medical decision making); 99214 (Office visit, established patient, moderate medical decision making); G0439 (Annual wellness visit, subsequent); 99490 (Chronic care management, first 20 minutes of clinical staff time); 99495 (Transitional care management, moderate complexity, 14-day visit); 99396 (Preventive medicine visit, established patient, ages 40–64) Characteristic denials: E/M level not supported; AWV versus physical confusion; CCM requirements unmet; Preventive coding errors; TCM timing violations URL: https://vizora.co/specialties/family-medicine ### Internal Medicine Internal medicine billing is dominated by complex chronic disease management, where patients carry multiple conditions and encounters legitimately support higher evaluation and management levels. The dominant revenue problem is systematic under-coding: documentation supports the complexity, but the note never states it in the terms the level requires. Common codes: 99214 (Office visit, established patient, moderate medical decision making); 99215 (Office visit, established patient, high medical decision making); 99490 (Chronic care management, first 20 minutes of clinical staff time); 99454 (Remote monitoring device supply with daily recording, 30 days); 99457 (Remote physiologic monitoring treatment management, first 20 minutes); 99424 (Principal care management, first 30 minutes by physician) Characteristic denials: Systematic under-coding; HCC conditions not re-documented; RPM element gaps; Overlapping care management; Time documentation missing URL: https://vizora.co/specialties/internal-medicine ### Anesthesia Anesthesia billing uses a payment formula unlike any other specialty: base units for the procedure plus time units plus modifying units, multiplied by a conversion factor. Medical direction modifiers describing the supervising relationship determine what share of the fee each provider receives, and errors there are systematic rather than occasional. Common codes: 00790 (Anesthesia for intraperitoneal procedures in upper abdomen); 01402 (Anesthesia for total knee arthroplasty); 00840 (Anesthesia for intraperitoneal procedures in lower abdomen); 01967 (Neuraxial labor analgesia for planned vaginal delivery); 99100 (Qualifying circumstance: patient under 1 year or over 70); 99140 (Qualifying circumstance: emergency condition) Characteristic denials: Medical direction modifier errors; Time documentation gaps; Concurrency violations; Incorrect base units; Unbilled qualifying circumstances URL: https://vizora.co/specialties/anesthesia ### Pain Management Pain management billing is defined by injection procedures with strict level, laterality and imaging guidance documentation requirements, and by payer medical policies that cap injection frequency. It is among the most heavily prior-authorized and most frequently audited specialties in medicine. Common codes: 64483 (Transforaminal epidural injection, lumbar or sacral, single level); 64484 (Transforaminal epidural injection, each additional level); 62323 (Interlaminar epidural injection, lumbar or sacral, with imaging guidance); 64635 (Radiofrequency ablation, lumbar or sacral facet joint, single level); 20552 (Trigger point injection, one or two muscles); 64490 (Facet joint injection, cervical or thoracic, single level) Characteristic denials: Frequency limits exceeded; Documented benefit missing; Imaging guidance billing errors; Prior authorization not obtained; Diagnostic block prerequisite URL: https://vizora.co/specialties/pain-management ### Physical Therapy Physical therapy billing is governed by the eight-minute rule, which converts documented treatment time into billable units for timed codes. Because PT is high-frequency and unit-based, small systematic errors in time documentation or modifier use compound across every patient on the schedule. Common codes: 97110 (Therapeutic exercise, each 15 minutes); 97140 (Manual therapy techniques, each 15 minutes); 97530 (Therapeutic activities, each 15 minutes); 97162 (Physical therapy evaluation, moderate complexity); 97012 (Mechanical traction, supervised untimed modality); 97535 (Self-care and home management training, each 15 minutes) Characteristic denials: Eight-minute rule errors; Missing KX modifier; Certification lapses; Authorization exhausted; NCCI pair edits URL: https://vizora.co/specialties/physical-therapy ### Gastroenterology Gastroenterology billing turns on one distinction more than any other: whether a colonoscopy is screening or diagnostic. That determination changes patient cost-sharing, the codes used, and modifier requirements — and when a screening colonoscopy becomes therapeutic mid-procedure, the billing must reflect the transition correctly. Common codes: 45378 (Colonoscopy, diagnostic, with or without collection of specimen); 45380 (Colonoscopy with biopsy, single or multiple); 45385 (Colonoscopy with removal of lesion by snare technique); G0121 (Colorectal cancer screening, colonoscopy, not high risk); 43239 (Upper GI endoscopy with biopsy, single or multiple); 45331 (Sigmoidoscopy with biopsy, single or multiple) Characteristic denials: Screening-to-diagnostic conversion; Frequency interval violations; Technique coding errors; Medicare G-code confusion; Anesthesia coordination URL: https://vizora.co/specialties/gastroenterology ### Radiology Radiology billing is dominated by the split between the technical component (equipment and staff) and the professional component (the radiologist's interpretation). Getting that attribution wrong is the defining error of the specialty, and it is systematic rather than occasional when the billing process does not model it explicitly. Common codes: 71046 (Radiologic examination, chest, two views); 74177 (CT abdomen and pelvis with contrast); 72148 (MRI lumbar spine without contrast); 76700 (Ultrasound, abdominal, complete); 77067 (Screening mammography, bilateral, with CAD); 70450 (CT head or brain without contrast) Characteristic denials: Component attribution errors; Missing prior authorization; Contrast coding errors; Medical necessity; Multiple procedure reduction URL: https://vizora.co/specialties/radiology ### Urgent Care Urgent care billing combines evaluation and management coding with in-house procedures, x-ray and point-of-care testing, delivered almost entirely to walk-in patients. The defining constraint is that eligibility cannot be verified in advance, which makes urgent care structurally more exposed to coverage denials than scheduled specialties. Common codes: 99213 (Office or outpatient visit, established patient, low complexity); 99203 (Office or outpatient visit, new patient, low complexity); 10060 (Incision and drainage of abscess, simple); 12001 (Simple repair of superficial wounds, 2.5 cm or less); S9083 (Global fee, urgent care center); 87804 (Infectious agent antigen detection, influenza) Characteristic denials: Coverage not verified; S-code non-recognition; New versus established errors; Procedure bundling; Non-urgent redetermination URL: https://vizora.co/specialties/urgent-care ### Neurology Neurology billing pairs complex, lengthy evaluation and management encounters with diagnostic testing — EEG, EMG, nerve conduction and sleep studies — that carry their own technical and professional splits and strict unit rules. Infusion therapies for multiple sclerosis and migraine add buy-and-bill drug billing on top. Common codes: 95886 (Needle electromyography, complete, each extremity); 95910 (Nerve conduction studies, 7–8 studies); 95816 (Electroencephalogram, awake and drowsy); 95810 (Polysomnography, sleep staging with 4 or more parameters); 64615 (Chemodenervation of facial and neck muscles for chronic migraine); 96413 (Chemotherapy or complex drug infusion, first hour) Characteristic denials: Nerve conduction unit caps; EMG and NCS combination rules; Drug units and wastage; Component splits on testing; Botulinum medical necessity URL: https://vizora.co/specialties/neurology ### Oncology Oncology billing carries the highest per-claim dollar values in outpatient medicine because of buy-and-bill chemotherapy and biologics. Drug acquisition cost means a single unit-calculation error or an unbilled wastage claim can exceed the value of an entire day of office visits. Common codes: 96413 (Chemotherapy administration, intravenous infusion, first hour); 96415 (Chemotherapy infusion, each additional hour); 96417 (Chemotherapy infusion, each additional sequential infusion); 77427 (Radiation treatment management, five treatments); 96372 (Therapeutic or diagnostic injection, subcutaneous or intramuscular); 77014 (CT guidance for placement of radiation therapy fields) Characteristic denials: Drug unit miscalculation; Unbilled wastage; Infusion hierarchy errors; Authorization not updated; Biosimilar code mismatch URL: https://vizora.co/specialties/oncology ### Ophthalmology Ophthalmology billing has a structural quirk no other specialty shares: patients often carry both medical and vision insurance, and determining which is responsible depends on the reason for the visit. Routing a claim to the wrong carrier is the most common avoidable denial in the specialty. Common codes: 92014 (Ophthalmological exam, established patient, comprehensive); 66984 (Cataract extraction with intraocular lens insertion); 67028 (Intravitreal injection of pharmacologic agent); 92134 (Optical coherence tomography, retina); 92083 (Visual field examination, extended); 65855 (Trabeculoplasty by laser surgery) Characteristic denials: Wrong carrier routed; OCT frequency limits; Injection drug units; Global period conflicts; Eye code versus E/M URL: https://vizora.co/specialties/ophthalmology ### Podiatry Podiatry billing is dominated by routine foot care coverage rules, which are among the most restrictive in Medicare. Nail and callus care is excluded unless the patient has a qualifying systemic condition documented alongside specific clinical findings — and that documentation requirement is where most podiatry revenue is lost. Common codes: 11721 (Debridement of nails, six or more); 11055 (Paring or cutting of benign hyperkeratotic lesion, single); 11042 (Debridement of subcutaneous tissue, first 20 sq cm); 28285 (Correction of hammertoe); A5500 (Diabetic shoe, custom preparation, per shoe); 97597 (Debridement of open wound, first 20 sq cm) Characteristic denials: Routine foot care exclusion; Missing Q modifiers; Treating physician not documented; Frequency limits; DME documentation gaps URL: https://vizora.co/specialties/podiatry ### Chiropractic Chiropractic billing is constrained by unusually narrow coverage: Medicare covers only spinal manipulation, and only when active treatment is documented rather than maintenance care. The active-versus-maintenance distinction determines payment on essentially every claim, and it is established entirely by documentation. Common codes: 98940 (Chiropractic manipulative treatment, one to two spinal regions); 98941 (Chiropractic manipulative treatment, three to four spinal regions); 98942 (Chiropractic manipulative treatment, five spinal regions); 97140 (Manual therapy techniques, each 15 minutes); 97012 (Mechanical traction, supervised modality); 97110 (Therapeutic exercise, each 15 minutes) Characteristic denials: Missing AT modifier; Maintenance care determination; Non-covered services to Medicare; Region count errors; Visit caps exceeded URL: https://vizora.co/specialties/chiropractic ### Urology Urology billing spans office procedures, endoscopy, in-office pathology and surgical work, which means multiple billing models operate inside a single practice. Global periods on surgery, bundling rules on cystoscopy, and buy-and-bill hormone therapy each require different handling. Common codes: 52000 (Cystourethroscopy, diagnostic, separate procedure); 55700 (Biopsy of prostate, needle or punch, single or multiple); 51798 (Measurement of post-voiding residual by ultrasound); 51741 (Complex uroflowmetry); J9217 (Leuprolide acetate suspension, 7.5 mg); 52332 (Cystourethroscopy with insertion of indwelling ureteral stent) Characteristic denials: Cystoscopy bundling; Imaging guidance unbundling; Drug units and wastage; Global period conflicts; Urodynamics component errors URL: https://vizora.co/specialties/urology ### ENT & Otolaryngology ENT billing combines office endoscopy, audiology, allergy testing and immunotherapy, and surgical procedures — four distinct billing models in one practice. Audiology and allergy services carry particularly restrictive coverage rules that differ sharply between Medicare and commercial plans. Common codes: 31231 (Nasal endoscopy, diagnostic, unilateral or bilateral); 69210 (Removal of impacted cerumen requiring instrumentation, unilateral); 92557 (Comprehensive audiometry threshold evaluation and speech recognition); 95165 (Professional services for antigen preparation, per dose); 42820 (Tonsillectomy and adenoidectomy, younger than age 12); 31237 (Nasal or sinus endoscopy with biopsy, polypectomy or debridement) Characteristic denials: Endoscopy bundling; Audiology purpose exclusion; Antigen dose units; Allergy test quantity caps; Cerumen removal requirements URL: https://vizora.co/specialties/ent ### Nephrology Nephrology billing is structured around monthly capitation for dialysis patients, where a single code covers a calendar month of care and its value depends on the number of documented face-to-face visits and the patient's age. Missing a required visit reduces the entire month's payment. Common codes: 90960 (ESRD services, four or more visits per month, patient 20 years or older); 90961 (ESRD services, two to three visits per month, patient 20 years or older); 90962 (ESRD services, one visit per month, patient 20 years or older); 90966 (ESRD services for home dialysis, full month, patient 20 years or older); 36901 (Introduction of needles into dialysis circuit with imaging); 90935 (Hemodialysis procedure with single physician evaluation) Characteristic denials: Visit count not documented; Partial month handling; Overlapping provider claims; Home versus in-center mismatch; Access procedure bundling URL: https://vizora.co/specialties/nephrology ### General Surgery General surgery billing turns almost entirely on global periods and modifier discipline. Major procedures carry a 90-day global period bundling pre-operative, intra-operative and routine post-operative care, and nearly every general surgery billing error is a failure to apply the correct modifier around that window. Common codes: 47562 (Laparoscopic cholecystectomy); 44970 (Laparoscopic appendectomy); 49505 (Repair of initial inguinal hernia, age 5 years or older); 19120 (Excision of breast lesion, open); 44140 (Colectomy, partial, with anastomosis); 49650 (Laparoscopic repair of initial inguinal hernia) Characteristic denials: Global period bundling; Missing modifier 57; Return-to-OR modifier errors; Assistant surgeon documentation; Conversion coding URL: https://vizora.co/specialties/general-surgery ### Wound Care Wound care billing is driven by debridement depth and surface area, and by skin substitute products whose acquisition cost frequently exceeds the procedure fee. Coverage requires documented wound measurements over time showing either progress or a justification for changing approach. Common codes: 97597 (Debridement of open wound, selective, first 20 sq cm); 11042 (Debridement of subcutaneous tissue, first 20 sq cm); 11043 (Debridement of muscle and/or fascia, first 20 sq cm); 15275 (Application of skin substitute graft, first 25 sq cm, trunk or limbs); 99183 (Physician attendance and supervision of hyperbaric oxygen therapy); 11044 (Debridement of bone, first 20 sq cm) Characteristic denials: Depth not documented; Surface area missing; No documented progress; Skin substitute coverage limits; HBO qualifying conditions URL: https://vizora.co/specialties/wound-care ### Durable Medical Equipment DME billing is documentation-driven to an unusual degree: the claim depends on records created by the ordering physician rather than the supplier. A standard written order, a face-to-face encounter within the required window, and proof of delivery must all exist before the claim is submitted. Common codes: E0601 (Continuous positive airway pressure device); K0001 (Standard wheelchair); E0143 (Walker, folding, wheeled, adjustable or fixed height); E1390 (Oxygen concentrator, single delivery port); A7030 (Full face mask used with positive airway pressure device); E0470 (Respiratory assist device, bi-level pressure capability) Characteristic denials: Incomplete written order; Face-to-face requirements; Modifier misuse; Proof of delivery missing; Capped rental sequence errors URL: https://vizora.co/specialties/dme --- ## Locations Each state differs in Medicaid program name, Medicaid delivery model, Medicare Administrative Contractor, expansion status and dominant commercial payers. Those four facts change how a claim is adjudicated. - Alabama (AL): Medicaid "Alabama Medicaid", fee-for-service, expansion no; MAC Palmetto GBA (JJ); payers Blue Cross and Blue Shield of Alabama, UnitedHealthcare, Viva Health. Alabama runs primary care case management rather than comprehensive risk-based managed care, so Medicaid claims are adjudicated by the state rather than by competing MCO plans. — https://vizora.co/locations/alabama - Alaska (AK): Medicaid "Alaska Medical Assistance", fee-for-service, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Premera Blue Cross Blue Shield of Alaska, Aetna, Moda Health. Alaska's fee-for-service Medicaid and extreme geography make travel and telehealth billing rules unusually consequential for rural practices. — https://vizora.co/locations/alaska - Arizona (AZ): Medicaid "AHCCCS", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Blue Cross Blue Shield of Arizona, Banner Health Plans, UnitedHealthcare. AHCCCS was the last state Medicaid program to launch and has operated as a fully managed care model since inception, so plan-level rules matter more than state-level ones. — https://vizora.co/locations/arizona - Arkansas (AR): Medicaid "ARHOME", mixed, expansion yes; MAC Novitas Solutions (JH); payers Arkansas Blue Cross and Blue Shield, QualChoice, Ambetter. Arkansas uses PASSE organizations for members with complex behavioral health and developmental needs, which sit outside standard Medicaid managed care billing. — https://vizora.co/locations/arkansas - California (CA): Medicaid "Medi-Cal", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JE); payers Anthem Blue Cross, Blue Shield of California, Kaiser Permanente, Health Net. Medi-Cal operates through roughly two dozen managed care plans whose authorization rules and encounter requirements differ by county, so 'billing Medi-Cal' is really billing whichever plan covers that county. — https://vizora.co/locations/california - Colorado (CO): Medicaid "Health First Colorado", mixed, expansion yes; MAC Novitas Solutions (JH); payers Anthem Blue Cross Blue Shield, Kaiser Permanente, Rocky Mountain Health Plans. Colorado routes Medicaid through Regional Accountable Entities rather than conventional MCOs, which changes how behavioral health and care coordination are billed. — https://vizora.co/locations/colorado - Connecticut (CT): Medicaid "HUSKY Health", fee-for-service, expansion yes; MAC National Government Services (JK); payers Anthem Blue Cross Blue Shield, ConnectiCare, Cigna. Connecticut moved off managed care organizations entirely and administers Medicaid on a fee-for-service basis through a single administrative services organization — unusual among large states. — https://vizora.co/locations/connecticut - Delaware (DE): Medicaid "Diamond State Health Plan", managed-care, expansion yes; MAC Novitas Solutions (JL); payers Highmark Blue Cross Blue Shield Delaware, AmeriHealth Caritas, Aetna. Delaware's small provider market means a handful of plans dominate, and Highmark's regional presence gives commercial contracting outsized influence on rates. — https://vizora.co/locations/delaware - Florida (FL): Medicaid "Statewide Medicaid Managed Care", managed-care, expansion no; MAC First Coast Service Options (JN); payers Florida Blue, Humana, AvMed, Sunshine Health. Florida's Statewide Medicaid Managed Care program is organized into regions with different plan lineups, and its large Medicare Advantage penetration makes MA prior authorization a dominant workflow. — https://vizora.co/locations/florida - Georgia (GA): Medicaid "Georgia Families", managed-care, expansion no; MAC Palmetto GBA (JJ); payers Anthem Blue Cross Blue Shield of Georgia, Peach State Health Plan, Kaiser Permanente. Georgia has not expanded Medicaid, so practices carry a higher share of self-pay and sliding-scale patients than in neighbouring expansion states. — https://vizora.co/locations/georgia - Hawaii (HI): Medicaid "Med-QUEST", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JE); payers HMSA (Blue Cross Blue Shield of Hawaii), Kaiser Permanente, UHA Health Insurance. HMSA holds a dominant commercial share in Hawaii, and the state's Prepaid Health Care Act produces employer coverage patterns found nowhere else in the country. — https://vizora.co/locations/hawaii - Idaho (ID): Medicaid "Idaho Medicaid", mixed, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Blue Cross of Idaho, Regence BlueShield of Idaho, PacificSource. Idaho runs medical Medicaid largely fee-for-service while carving behavioral health and dual-eligible care into managed arrangements, so routing depends on service type. — https://vizora.co/locations/idaho - Illinois (IL): Medicaid "HealthChoice Illinois", managed-care, expansion yes; MAC National Government Services (J6); payers Blue Cross and Blue Shield of Illinois, Aetna Better Health, Meridian. HealthChoice Illinois consolidated to a smaller set of statewide plans, but Cook County's provider density means commercial contracting varies sharply between Chicago and downstate. — https://vizora.co/locations/illinois - Indiana (IN): Medicaid "Healthy Indiana Plan", managed-care, expansion yes; MAC Wisconsin Physicians Service (J8); payers Anthem Blue Cross Blue Shield, CareSource, MDwise. The Healthy Indiana Plan uses POWER account cost-sharing, which creates patient-responsibility mechanics that differ from standard Medicaid. — https://vizora.co/locations/indiana - Iowa (IA): Medicaid "IA Health Link", managed-care, expansion yes; MAC Wisconsin Physicians Service (J5); payers Wellmark Blue Cross and Blue Shield, Amerigroup Iowa, Molina Healthcare. Iowa's fully privatized Medicaid managed care has seen repeated plan turnover, making enrollment verification before each visit more important than in stable markets. — https://vizora.co/locations/iowa - Kansas (KS): Medicaid "KanCare", managed-care, expansion no; MAC Wisconsin Physicians Service (J5); payers Blue Cross and Blue Shield of Kansas, Aetna Better Health, Sunflower Health Plan. KanCare covers the entire Medicaid population through three plans, and Kansas has not expanded eligibility — raising self-pay exposure for practices near the Missouri line. — https://vizora.co/locations/kansas - Kentucky (KY): Medicaid "Kentucky Medicaid", managed-care, expansion yes; MAC CGS Administrators (J15); payers Anthem Blue Cross Blue Shield, Passport Health Plan, WellCare. Kentucky's Medicaid expansion produced one of the largest coverage shifts in the country, and managed care plans handle the bulk of the adult population. — https://vizora.co/locations/kentucky - Louisiana (LA): Medicaid "Healthy Louisiana", managed-care, expansion yes; MAC Novitas Solutions (JH); payers Blue Cross and Blue Shield of Louisiana, Healthy Blue, Aetna Better Health. Healthy Louisiana operates through a small set of plans, and the state's high rate of chronic disease burden makes chronic care management billing materially valuable. — https://vizora.co/locations/louisiana - Maine (ME): Medicaid "MaineCare", fee-for-service, expansion yes; MAC National Government Services (JK); payers Anthem Blue Cross Blue Shield, Harvard Pilgrim Health Care, Community Health Options. MaineCare is administered predominantly fee-for-service, and Maine's rural provider distribution makes critical access and telehealth billing rules central. — https://vizora.co/locations/maine - Maryland (MD): Medicaid "Maryland HealthChoice", managed-care, expansion yes; MAC Novitas Solutions (JL); payers CareFirst BlueCross BlueShield, Kaiser Permanente, Priority Partners. Maryland's all-payer hospital rate-setting model is unique in the United States and changes facility reimbursement mechanics that exist nowhere else. — https://vizora.co/locations/maryland - Massachusetts (MA): Medicaid "MassHealth", managed-care, expansion yes; MAC National Government Services (JK); payers Blue Cross Blue Shield of Massachusetts, Harvard Pilgrim Health Care, Tufts Health Plan, Mass General Brigham Health Plan. MassHealth ACO arrangements shift meaningful risk to provider organizations, so accurate diagnosis documentation affects revenue beyond fee-for-service billing. — https://vizora.co/locations/massachusetts - Michigan (MI): Medicaid "Healthy Michigan Plan", managed-care, expansion yes; MAC Wisconsin Physicians Service (J8); payers Blue Cross Blue Shield of Michigan, Priority Health, Meridian Health Plan. Blue Cross Blue Shield of Michigan holds an unusually concentrated commercial share, which makes a single payer's policy changes disproportionately consequential. — https://vizora.co/locations/michigan - Minnesota (MN): Medicaid "Minnesota Medical Assistance", managed-care, expansion yes; MAC National Government Services (J6); payers Blue Cross and Blue Shield of Minnesota, HealthPartners, Medica, UCare. Minnesota's nonprofit-dominated insurance market and county-based purchasing arrangements produce plan structures that differ from most states. — https://vizora.co/locations/minnesota - Mississippi (MS): Medicaid "MississippiCAN", managed-care, expansion no; MAC Novitas Solutions (JH); payers Blue Cross & Blue Shield of Mississippi, Magnolia Health, UnitedHealthcare. Mississippi has not expanded Medicaid and has the country's highest rate of rural hospital financial distress, making AR discipline especially consequential. — https://vizora.co/locations/mississippi - Missouri (MO): Medicaid "MO HealthNet", managed-care, expansion yes; MAC Wisconsin Physicians Service (J5); payers Anthem Blue Cross Blue Shield, Home State Health, Cigna. Missouri expanded Medicaid by ballot initiative with retroactive eligibility complications, so coverage verification for newly eligible adults requires particular care. — https://vizora.co/locations/missouri - Montana (MT): Medicaid "Montana Medicaid", fee-for-service, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Blue Cross and Blue Shield of Montana, PacificSource, Allegiance. Montana administers Medicaid largely fee-for-service, and its frontier geography makes travel, telehealth and critical access billing rules central to rural practices. — https://vizora.co/locations/montana - Nebraska (NE): Medicaid "Heritage Health", managed-care, expansion yes; MAC Wisconsin Physicians Service (J5); payers Blue Cross and Blue Shield of Nebraska, Nebraska Total Care, Medica. Heritage Health integrates physical, behavioral and pharmacy benefits under single plans, which simplifies routing but concentrates authorization authority. — https://vizora.co/locations/nebraska - Nevada (NV): Medicaid "Nevada Medicaid", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JE); payers Anthem Blue Cross Blue Shield, Health Plan of Nevada, SilverSummit Healthplan. Nevada's provider shortage relative to population produces long authorization queues, and Las Vegas commercial contracting differs markedly from the north. — https://vizora.co/locations/nevada - New Hampshire (NH): Medicaid "NH Medicaid Care Management", managed-care, expansion yes; MAC National Government Services (JK); payers Anthem Blue Cross Blue Shield, Harvard Pilgrim Health Care, AmeriHealth Caritas. New Hampshire's small market and proximity to Massachusetts mean many practices hold contracts with Boston-area systems and payers alongside in-state plans. — https://vizora.co/locations/new-hampshire - New Jersey (NJ): Medicaid "NJ FamilyCare", managed-care, expansion yes; MAC Novitas Solutions (JL); payers Horizon Blue Cross Blue Shield of New Jersey, AmeriHealth, Aetna. Horizon's dominant share plus dense proximity to New York and Philadelphia markets means many New Jersey practices bill across three states' payer landscapes. — https://vizora.co/locations/new-jersey - New Mexico (NM): Medicaid "Turquoise Care", managed-care, expansion yes; MAC Novitas Solutions (JH); payers Blue Cross and Blue Shield of New Mexico, Presbyterian Health Plan, Western Sky Community Care. Turquoise Care replaced Centennial Care with revised plan participation, so payer IDs and authorization pathways changed recently and older billing configurations may be stale. — https://vizora.co/locations/new-mexico - New York (NY): Medicaid "New York Medicaid", managed-care, expansion yes; MAC National Government Services (JK); payers Empire BlueCross BlueShield, Excellus BlueCross BlueShield, EmblemHealth, Healthfirst, Fidelis Care. New York's eMedNY system, multiple independent regional Blues plans and large Medicaid managed care market make it one of the most fragmented payer environments in the country. — https://vizora.co/locations/new-york - North Carolina (NC): Medicaid "NC Medicaid Managed Care", managed-care, expansion yes; MAC Palmetto GBA (JM); payers Blue Cross and Blue Shield of North Carolina, UnitedHealthcare, WellCare. North Carolina transitioned from fee-for-service to managed care relatively recently, and practices with older billing setups sometimes still route claims incorrectly. — https://vizora.co/locations/north-carolina - North Dakota (ND): Medicaid "North Dakota Medicaid", mixed, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Blue Cross Blue Shield of North Dakota, Sanford Health Plan, Medica. North Dakota keeps most Medicaid fee-for-service with a single plan covering the expansion population, so routing depends on which eligibility category the patient falls under. — https://vizora.co/locations/north-dakota - Ohio (OH): Medicaid "Ohio Medicaid", managed-care, expansion yes; MAC CGS Administrators (J15); payers Anthem Blue Cross Blue Shield, Medical Mutual of Ohio, CareSource. Ohio's Medicaid redesign introduced a single pharmacy benefit manager and centralized credentialing, changing enrollment workflows for all participating plans. — https://vizora.co/locations/ohio - Oklahoma (OK): Medicaid "SoonerCare", mixed, expansion yes; MAC Novitas Solutions (JH); payers Blue Cross and Blue Shield of Oklahoma, CommunityCare, GlobalHealth. Oklahoma moved to SoonerSelect managed care recently after operating fee-for-service for decades, so plan-level rules are new territory for many practices. — https://vizora.co/locations/oklahoma - Oregon (OR): Medicaid "Oregon Health Plan", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Regence BlueCross BlueShield of Oregon, Providence Health Plan, Moda Health, PacificSource. Oregon's Coordinated Care Organizations hold global budgets covering physical, behavioral and dental care, which is structurally unlike conventional Medicaid managed care. — https://vizora.co/locations/oregon - Pennsylvania (PA): Medicaid "HealthChoices", managed-care, expansion yes; MAC Novitas Solutions (JL); payers Highmark Blue Cross Blue Shield, Independence Blue Cross, UPMC Health Plan, Geisinger Health Plan. Pennsylvania is effectively two commercial markets — Highmark in the west, Independence Blue Cross in the east — with HealthChoices Medicaid zones layered on top. — https://vizora.co/locations/pennsylvania - Rhode Island (RI): Medicaid "RIte Care", managed-care, expansion yes; MAC National Government Services (JK); payers Blue Cross & Blue Shield of Rhode Island, Neighborhood Health Plan of RI, UnitedHealthcare. Rhode Island's small size and single dominant Blues plan mean commercial contracting terms move slowly but affect nearly every practice at once. — https://vizora.co/locations/rhode-island - South Carolina (SC): Medicaid "Healthy Connections", managed-care, expansion no; MAC Palmetto GBA (JM); payers BlueCross BlueShield of South Carolina, Select Health of South Carolina, Absolute Total Care. South Carolina has not expanded Medicaid, and BlueCross BlueShield of South Carolina holds a commanding commercial share plus the Medicare contractor relationship. — https://vizora.co/locations/south-carolina - South Dakota (SD): Medicaid "South Dakota Medicaid", fee-for-service, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Wellmark Blue Cross and Blue Shield, Sanford Health Plan, Avera Health Plans. South Dakota administers Medicaid fee-for-service, and its provider market is dominated by two large integrated health systems that also operate health plans. — https://vizora.co/locations/south-dakota - Tennessee (TN): Medicaid "TennCare", managed-care, expansion no; MAC Palmetto GBA (JJ); payers BlueCross BlueShield of Tennessee, Amerigroup, UnitedHealthcare Community Plan. TennCare operates under a longstanding federal waiver with a block-grant style financing arrangement found in no other state, and Tennessee has not expanded eligibility. — https://vizora.co/locations/tennessee - Texas (TX): Medicaid "Texas Medicaid and STAR", managed-care, expansion no; MAC Novitas Solutions (JH); payers Blue Cross and Blue Shield of Texas, Superior HealthPlan, Community Health Choice, Baylor Scott & White Health Plan. Texas splits Medicaid across STAR, STAR+PLUS and STAR Kids programs with different plan lineups by service area, and has not expanded eligibility — producing both program complexity and high self-pay volume. — https://vizora.co/locations/texas - Utah (UT): Medicaid "Utah Medicaid", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Regence BlueCross BlueShield of Utah, SelectHealth, University of Utah Health Plans. Utah's partial expansion history and Intermountain's integrated payer-provider position make commercial contracting unusually concentrated. — https://vizora.co/locations/utah - Vermont (VT): Medicaid "Green Mountain Care", fee-for-service, expansion yes; MAC National Government Services (JK); payers Blue Cross and Blue Shield of Vermont, MVP Health Care, The Vermont Health Plan. Vermont operates its Medicaid program as its own public managed care entity rather than contracting with commercial MCOs, and its all-payer ACO model shifts risk to providers. — https://vizora.co/locations/vermont - Virginia (VA): Medicaid "Cardinal Care", managed-care, expansion yes; MAC Palmetto GBA (JM); payers Anthem HealthKeepers, Sentara Health Plans, Aetna Better Health of Virginia. Cardinal Care consolidated Virginia's previously separate Medicaid programs under one brand, and Northern Virginia practices frequently bill DC and Maryland payers as well. — https://vizora.co/locations/virginia - Washington (WA): Medicaid "Apple Health", managed-care, expansion yes; MAC Noridian Healthcare Solutions (JF); payers Premera Blue Cross, Regence BlueShield, Kaiser Permanente Washington, Molina Healthcare. Apple Health integrates physical and behavioral health under single managed care contracts statewide, and Washington's balance billing protections are among the more prescriptive. — https://vizora.co/locations/washington - West Virginia (WV): Medicaid "Mountain Health Trust", managed-care, expansion yes; MAC Palmetto GBA (JM); payers Highmark Blue Cross Blue Shield West Virginia, The Health Plan, Aetna Better Health. West Virginia's rural provider distribution and high chronic disease burden make chronic care management and remote monitoring billing particularly relevant. — https://vizora.co/locations/west-virginia - Wisconsin (WI): Medicaid "BadgerCare Plus", managed-care, expansion no; MAC National Government Services (J6); payers Anthem Blue Cross Blue Shield, Quartz, Security Health Plan, Dean Health Plan. Wisconsin has not formally expanded Medicaid but covers adults to the poverty line through BadgerCare Plus, producing an eligibility structure unlike either expansion or non-expansion states. — https://vizora.co/locations/wisconsin - Wyoming (WY): Medicaid "Wyoming Medicaid", fee-for-service, expansion no; MAC Noridian Healthcare Solutions (JF); payers Blue Cross Blue Shield of Wyoming, Cigna, UnitedHealthcare. Wyoming administers Medicaid fee-for-service, has not expanded eligibility, and its frontier geography makes it one of the most challenging states for provider network adequacy. — https://vizora.co/locations/wyoming --- ## Denial codes (CARC / RARC) ### CO-4 — Procedure code inconsistent with the modifier used, or a required modifier is missing Category: Coding Meaning: The payer expected a modifier that was not submitted, or the modifier submitted contradicts the procedure code. Fix: Identify the modifier the procedure requires for this payer, correct the claim line and resubmit as a corrected claim. Prevention: Build payer-specific modifier requirements into claim scrubbing so missing modifiers are caught before submission. In depth: https://vizora.co/denial-codes/co-4 ### CO-6 — Procedure or revenue code inconsistent with the patient's age Category: Coding Meaning: The code billed is age-restricted and the patient's date of birth falls outside the permitted range. Fix: Verify the patient's date of birth on file, then confirm the code is age-appropriate. Correct whichever is wrong and resubmit. Prevention: Validate demographics at registration and apply age-edit checks during scrubbing. ### CO-11 — The diagnosis is inconsistent with the procedure Category: Coding Meaning: The diagnosis code submitted does not support medical necessity for the procedure under the payer's policy. Fix: Review documentation for a diagnosis that accurately reflects the encounter and supports the service. Resubmit with correct linkage — never change a diagnosis to obtain payment. Prevention: Check the payer's coverage policy for the procedure before service, and confirm diagnosis-to-procedure linkage during coding. In depth: https://vizora.co/denial-codes/co-11 ### CO-15 — The authorization number is missing, invalid, or does not apply Category: Authorization Meaning: An authorization exists or was required, but the number on the claim is absent or does not match the payer's record. Fix: Retrieve the correct authorization number and confirm it covers this date of service, provider and procedure, then resubmit. Prevention: Store authorization numbers against the specific service and date, and carry them onto the claim automatically. In depth: https://vizora.co/denial-codes/co-15 ### CO-16 — Claim or service lacks information needed for adjudication Category: Data quality Meaning: The single most common denial. A required data element is missing or invalid. Always paired with a RARC that names the specific field. Fix: Read the accompanying RARC — CO-16 alone tells you nothing. The RARC identifies the missing element. Correct that field and resubmit. Prevention: Track which RARCs accompany your CO-16 denials. They almost always cluster around a few repeatable registration or claim-build gaps. In depth: https://vizora.co/denial-codes/co-16 ### CO-18 — Exact duplicate claim or service Category: Data quality Meaning: The payer has already received an identical claim. Often triggered by resubmitting rather than filing a corrected claim. Fix: Check the status of the original claim first. If it was legitimately a distinct service on the same day, resubmit with an appropriate modifier such as 76 or 91. Prevention: Use corrected-claim workflows rather than resubmission, and confirm original claim status before refiling. In depth: https://vizora.co/denial-codes/co-18 ### CO-22 — This care may be covered by another payer per coordination of benefits Category: Eligibility Meaning: The patient has other coverage the payer believes is primary. Fix: Confirm the correct payer order with the patient, bill the primary payer first, then submit to this payer with the primary's explanation of benefits. Prevention: Capture and verify all active coverage at registration, including secondary and tertiary, and re-verify periodically. In depth: https://vizora.co/denial-codes/co-22 ### CO-23 — The impact of prior payer adjudication Category: Contractual Meaning: An adjustment reflecting what the primary payer already paid or adjusted. Usually informational rather than a true denial. Fix: Verify the secondary payer applied the primary's payment correctly. If the math is right, no action is needed. Prevention: Submit complete primary EOB data with secondary claims so adjudication is accurate first time. ### CO-24 — Charges are covered under a capitation agreement or managed care plan Category: Coverage Meaning: The service falls under a capitated arrangement, so no fee-for-service payment is due. Fix: Confirm the patient is genuinely enrolled in the capitated plan. If so, the balance is not separately billable. Prevention: Flag capitated patients in your system so these services are not billed fee-for-service. ### CO-27 — Expenses incurred after coverage terminated Category: Eligibility Meaning: The patient's coverage ended before the date of service. Fix: Verify the actual termination date. If the patient has new coverage, bill that payer; if not, the balance transfers to patient responsibility. Prevention: Verify eligibility before every visit rather than at intake only. Coverage terminations are invisible until you check. In depth: https://vizora.co/denial-codes/co-27 ### CO-29 — The time limit for filing has expired Category: Timely filing Meaning: The claim was submitted after the payer's filing deadline, typically 90 to 365 days from date of service. Fix: Appeal only if you can document timely original submission — a clearinghouse acceptance report is the strongest evidence. Otherwise the revenue is lost. Prevention: Work AR by filing deadline proximity, not just by balance. This denial is permanent and entirely preventable. In depth: https://vizora.co/denial-codes/co-29 ### CO-31 — Patient cannot be identified as our insured Category: Eligibility Meaning: The payer cannot match the patient to an active policy using the identifiers submitted. Fix: Re-verify the member ID, name spelling and date of birth exactly as they appear on the card, then resubmit. Prevention: Scan or photograph insurance cards at registration and verify electronically rather than transcribing by hand. In depth: https://vizora.co/denial-codes/co-31 ### CO-45 — Charge exceeds the fee schedule or contracted maximum allowable Category: Contractual Meaning: Not a denial — this is the contractual adjustment between your billed charge and your contracted rate. The most frequently seen code on any remittance. Fix: No action if the allowed amount matches your contract. If it is lower than contracted, this is an underpayment worth disputing. Prevention: Load contracted rates into your system and reconcile allowed amounts against them. Underpayments hide inside routine CO-45 adjustments. In depth: https://vizora.co/denial-codes/co-45 ### CO-50 — Non-covered service because it is not deemed a medical necessity Category: Coverage Meaning: The payer determined the service was not medically necessary under its coverage policy for the diagnosis submitted. Fix: Appeal with clinical documentation addressing the payer's specific medical necessity criteria. Review the applicable coverage policy before writing the appeal. Prevention: Check coverage policies before performing elective services, and issue an advance beneficiary notice where non-coverage is likely. In depth: https://vizora.co/denial-codes/co-50 ### CO-58 — Treatment was deemed to have been rendered in an inappropriate or invalid place of service Category: Coverage Meaning: The place of service code does not match where the payer believes the service should be performed. Fix: Verify the place of service code is correct for where care was actually delivered, and correct if miscoded. Prevention: Validate place of service codes during scrubbing, particularly for telehealth and off-campus locations where conventions change. ### CO-59 — Processed based on multiple or concurrent procedure rules Category: Bundling Meaning: Multiple procedure payment reduction was applied — subsequent procedures in the same session pay at a reduced rate. Fix: Confirm the reduction matches the payer's published methodology. If procedures were genuinely distinct sessions, appeal with documentation. Prevention: Model expected multiple-procedure reductions so reduced payment is not mistaken for underpayment. In depth: https://vizora.co/denial-codes/co-59 ### CO-96 — Non-covered charges Category: Coverage Meaning: The service is not covered under the plan. A RARC normally explains why. Fix: Read the accompanying RARC. If exclusion is correct and a valid advance notice was issued, bill the patient; otherwise it is a write-off. Prevention: Verify benefits for the specific service, not just active coverage, and issue advance notices where exclusion is likely. In depth: https://vizora.co/denial-codes/co-96 ### CO-97 — The benefit for this service is included in the payment for another service already adjudicated Category: Bundling Meaning: The service was bundled into another procedure — typically an NCCI edit or a global period inclusion. Fix: Determine whether the services were genuinely separate. If so, appeal with documentation supporting an appropriate modifier such as 25, 59 or an X modifier. If bundling is correct, adjust. Prevention: Run NCCI edits during scrubbing and apply global period logic so bundled services are not billed separately. In depth: https://vizora.co/denial-codes/co-97 ### CO-109 — Claim is not covered by this payer or contractor Category: Eligibility Meaning: The claim went to the wrong payer entirely — a frequent cause is behavioral health carve-outs and Medicare Advantage plans billed as traditional Medicare. Fix: Identify the correct payer and payer ID, then submit there. Watch the filing deadline, which runs from date of service. Prevention: Verify the actual administering payer at eligibility check, including any carve-out arrangements. In depth: https://vizora.co/denial-codes/co-109 ### CO-119 — Benefit maximum for this time period or occurrence has been reached Category: Coverage Meaning: The patient has exhausted a covered benefit limit — visit caps, dollar maximums or frequency limits. Fix: Confirm the maximum with the payer. Once genuinely exhausted, the balance becomes patient responsibility if properly noticed. Prevention: Track remaining benefits for capped services such as therapy, chiropractic and behavioral health, and notify patients before the cap is hit. In depth: https://vizora.co/denial-codes/co-119 ### CO-140 — Patient or insured health identification number and name do not match Category: Data quality Meaning: The member ID and patient name submitted do not correspond in the payer's records. Fix: Verify the member ID and the name exactly as shown on the insurance card, including suffixes and hyphenation, and resubmit. Prevention: Use electronic eligibility verification, which returns the payer's own spelling, rather than manual card transcription. In depth: https://vizora.co/denial-codes/co-140 ### CO-151 — Payment adjusted because the payer deems the information submitted does not support this many services Category: Coverage Meaning: The units or frequency billed exceed what the payer considers supported for this service. Fix: Verify units were calculated correctly. If the volume was clinically warranted, appeal with documentation justifying the quantity. Prevention: Apply payer frequency and unit limits during scrubbing, particularly for timed codes, drug units and diagnostic studies. In depth: https://vizora.co/denial-codes/co-151 ### CO-167 — This diagnosis is not covered Category: Coverage Meaning: The diagnosis submitted is excluded from coverage under the plan. Fix: Confirm the diagnosis accurately reflects documentation. If another supported diagnosis better represents the encounter, correct and resubmit. Prevention: Review payer coverage policies for diagnosis restrictions before performing elective services. In depth: https://vizora.co/denial-codes/co-167 ### CO-170 — Payment denied when performed or billed by this type of provider Category: Coverage Meaning: The provider type or specialty is not eligible to bill this service under the plan. Fix: Verify the rendering provider's enrollment and specialty designation with the payer. Correct the provider on the claim if it was submitted under the wrong NPI. Prevention: Confirm scope-of-service eligibility during credentialing, not after the first denial. ### CO-181 — Procedure code was invalid on the date of service Category: Coding Meaning: The code was deleted, replaced or not yet effective on the service date. Common each January and October when code sets update. Fix: Look up the valid code for that date of service and resubmit. Codes are date-of-service specific, not submission-date specific. Prevention: Update code sets before each effective date and validate codes against the service date during scrubbing. ### CO-197 — Precertification, authorization or notification absent Category: Authorization Meaning: Required authorization was not obtained before the service was delivered. Fix: Request retroactive authorization immediately — many payers permit it within a limited window. Otherwise appeal with clinical documentation supporting medical necessity. Prevention: Verify authorization requirements at scheduling, not at check-in. Authorization denials arrive after the cost of care is already sunk. In depth: https://vizora.co/denial-codes/co-197 ### CO-198 — Precertification, authorization or notification exceeded Category: Authorization Meaning: Services were delivered beyond the number, duration or scope authorized. Fix: Request an authorization extension with documentation supporting continued medical necessity, and appeal the delivered visits. Prevention: Track remaining authorized units per patient and request extensions before exhaustion rather than after. In depth: https://vizora.co/denial-codes/co-198 ### CO-204 — Service, equipment or drug is not covered under the patient's current benefit plan Category: Coverage Meaning: A plan-level exclusion rather than a medical necessity determination. Fix: Confirm the exclusion. If a valid advance notice was issued, the balance is billable to the patient; otherwise it is a write-off. Prevention: Verify benefits for the specific service before delivery, and issue advance notices for likely exclusions. In depth: https://vizora.co/denial-codes/co-204 ### CO-234 — This procedure is not paid separately Category: Bundling Meaning: The service has no separate payment because its value is included in another service. Fix: Verify the bundling is correct under the payer's policy. If the service was genuinely distinct, appeal with supporting documentation. Prevention: Identify status-B and bundled codes during scrubbing so they are not billed with an expectation of payment. In depth: https://vizora.co/denial-codes/co-234 ### CO-236 — This procedure or combination is not compatible with another procedure provided on the same day Category: Bundling Meaning: An NCCI procedure-to-procedure edit rejected the code pair. Fix: Check the NCCI edit and whether it permits a modifier override. If services were genuinely distinct by site, session or encounter, resubmit with the appropriate X modifier and documentation. Prevention: Run NCCI procedure-to-procedure edits during scrubbing rather than discovering pairs at adjudication. In depth: https://vizora.co/denial-codes/co-236 ### PR-1 — Deductible amount Category: Patient responsibility Meaning: The amount applied to the patient's annual deductible. Billable to the patient. Fix: Bill the patient. Confirm the deductible was applied correctly against their accumulated year-to-date amount. Prevention: Check real-time deductible status at eligibility verification so patients can be given accurate estimates and collected at the point of service. In depth: https://vizora.co/denial-codes/pr-1 ### PR-2 — Coinsurance amount Category: Patient responsibility Meaning: The percentage of the allowed amount the patient owes. Billable to the patient. Fix: Bill the patient, or the secondary payer if one exists. Prevention: Quote coinsurance at the point of service using verified benefits so the balance is not a surprise. In depth: https://vizora.co/denial-codes/pr-2 ### PR-3 — Copayment amount Category: Patient responsibility Meaning: The flat per-visit amount owed by the patient. Should generally be collected at the visit. Fix: Bill the patient if it was not collected at check-in. Prevention: Verify copay amounts at eligibility check and collect at the front desk. Copays collected later cost far more to recover. In depth: https://vizora.co/denial-codes/pr-3 ### PR-49 — Routine or preventive examination not covered Category: Coverage Meaning: A routine service was billed to a plan that excludes it — common where preventive and problem-focused services are miscoded. Fix: Confirm whether the visit was genuinely preventive. If a problem was addressed, it may be billable separately with appropriate coding. Prevention: Distinguish preventive from problem-focused services during coding, and apply modifier 25 correctly when both occur. In depth: https://vizora.co/denial-codes/pr-49 ### PR-204 — Service not covered under the patient's plan, patient responsibility Category: Patient responsibility Meaning: A non-covered service where the payer assigns the balance to the patient. Fix: Bill the patient, provided a valid advance notice was issued before service. Prevention: Issue advance beneficiary notices before delivering likely non-covered services. Without one, this balance is often not collectible. In depth: https://vizora.co/denial-codes/pr-204 ### PR-B7 — Provider was not certified or eligible to be paid for this procedure on this date of service Category: Authorization Meaning: A credentialing gap — the rendering provider was not enrolled with the payer on the service date. Fix: Check enrollment effective dates. If enrollment was later made retroactive, resubmit. If not, the revenue is generally unrecoverable. Prevention: Begin credentialing well before a provider's start date and do not schedule payer-specific patients until enrollment is effective. In depth: https://vizora.co/denial-codes/pr-b7 ### CO-B15 — This service requires that a qualifying service or procedure be received and covered Category: Bundling Meaning: An add-on code was billed without its required primary procedure, or the primary was denied. Fix: Confirm the primary procedure was billed and paid. If it was omitted, submit it; if denied, resolve the primary denial first. Prevention: Enforce add-on-to-primary code pairing during scrubbing so add-on codes never submit alone. In depth: https://vizora.co/denial-codes/co-b15 ### N130 — Consult plan benefit documents for information about restrictions on this service Category: Coverage Meaning: A remark code directing you to the plan's specific coverage terms. Accompanies a CARC rather than standing alone. Fix: Review the plan's coverage policy for the service, then determine whether appeal is viable. Prevention: Maintain payer policy references for high-volume services so restrictions are known before delivery. ### N657 — This should be billed with the appropriate code for these services Category: Coding Meaning: The payer is indicating a different code should have been used for what was performed. Fix: Review documentation and identify the correct code, then submit a corrected claim. Prevention: Track which services generate this remark; it usually signals a systematic coding misunderstanding rather than a one-off error. ### MA130 — Claim contains incomplete or invalid information; no appeal rights are afforded Category: Data quality Meaning: The claim was rejected rather than denied, so there is nothing to appeal. It must be corrected and refiled. Fix: Correct the identified information and submit as a new claim, not an appeal. Watch the filing deadline, which continues running. Prevention: Strengthen pre-submission scrubbing. Rejections carry no appeal rights, which makes prevention the only remedy. In depth: https://vizora.co/denial-codes/ma130 ### CO-5 — Procedure code or type of bill inconsistent with the place of service Category: Coding Meaning: The code billed is not payable in the setting reported in box 24B. Fix: Confirm where the service was actually delivered, correct the place-of-service code and resubmit. Prevention: Default the place of service per location and per provider schedule rather than letting it be keyed per claim. ### CO-7 — Procedure or revenue code inconsistent with the patient's gender Category: Coding Meaning: The code is gender-restricted and conflicts with the gender on the payer's record. Fix: Verify the gender on file against the payer's record. Where the service is genuinely correct, some payers accept documentation or a condition code. Prevention: Validate demographics against the payer's eligibility response rather than the chart, and apply gender edits in scrubbing. ### CO-9 — The diagnosis is inconsistent with the patient's age Category: Coding Meaning: The diagnosis carries an age restriction the patient falls outside of. Fix: Confirm the date of birth, then confirm the diagnosis reflects the encounter. Correct whichever is wrong and resubmit. Prevention: Apply age edits to diagnosis as well as procedure codes; most scrubbers check only procedures by default. ### CO-10 — The diagnosis is inconsistent with the patient's gender Category: Coding Meaning: A gender-restricted diagnosis conflicts with the gender on record. Fix: Verify the demographic record and the diagnosis. Correct the incorrect element and resubmit. Prevention: Verify demographics electronically at registration so the payer's own record is what you carry forward. ### CO-12 — The diagnosis is inconsistent with the provider type Category: Coding Meaning: The payer does not expect this diagnosis from a provider of this specialty or taxonomy. Fix: Confirm the taxonomy code submitted matches the rendering provider's enrolled specialty, then resubmit. Prevention: Check that taxonomy is loaded correctly per provider per payer; this is enrolment configuration, not a coding decision. ### CO-13 — The date of death precedes the date of service Category: Data quality Meaning: The payer has a date of death on file earlier than the service date. Fix: Confirm the service date is correct. If the payer's record is wrong the patient's family or the payer must correct it before the claim can process. Prevention: Rare, and usually a keying error on the service date. Check dates before appealing. ### CO-14 — The date of birth follows the date of service Category: Data quality Meaning: The date of birth on file is later than the date of service. Fix: Correct the date of birth or the date of service, whichever was keyed wrong, and resubmit. Prevention: Verify demographics electronically so the payer's own spelling and dates are what you submit. ### CO-17 — Requested information was not provided or was insufficient Category: Documentation Meaning: The payer asked for records or detail and did not receive an adequate response. Fix: Find the original request, send exactly what was asked for, and reference the request in the cover documentation. Prevention: Log every payer records request against the claim with a due date. These expire quietly and become uncollectable. In depth: https://vizora.co/denial-codes/co-17 ### CO-19 — This is a work-related injury and is the liability of the workers compensation carrier Category: Liability and workers comp Meaning: The payer considers the injury occupational and therefore not its responsibility. Fix: Confirm with the patient and employer whether a workers compensation claim exists, obtain the carrier and claim number, and bill that carrier. Prevention: Ask about work-relatedness at registration for any injury presentation. Discovering it after billing wastes a filing window. In depth: https://vizora.co/denial-codes/co-19 ### CO-20 — This injury is covered by the liability carrier Category: Liability and workers comp Meaning: The payer believes a third-party liability carrier is responsible. Fix: Identify the liability carrier and claim number and bill them. Where liability is disputed, some plans pay pending subrogation. Prevention: Capture accident details and any third-party carrier at registration for injury-related visits. ### CO-21 — This injury is the liability of the no-fault carrier Category: Liability and workers comp Meaning: Auto no-fault or personal injury protection coverage is considered primary. Fix: Obtain the no-fault carrier, claim number and adjuster, then bill that carrier first. Prevention: Ask whether an injury was motor-vehicle related at registration; no-fault benefits also exhaust, so bill promptly. ### CO-26 — Expenses incurred prior to coverage Category: Eligibility Meaning: The service predates the coverage effective date. Fix: Verify the actual effective date. If the patient had different coverage on the date of service, bill that payer. Prevention: Verify coverage for the specific date of service rather than for today. Effective dates move retroactively more often than expected. In depth: https://vizora.co/denial-codes/co-26 ### CO-28 — Coverage not in effect at the time the service was provided Category: Eligibility Meaning: No active coverage existed on the date of service under this plan. Fix: Confirm the coverage gap, identify any other active coverage, and rebill or transfer to patient responsibility. Prevention: Re-verify before every visit. A verification performed at the previous encounter says nothing about this one. ### CO-30 — Patient has not met eligibility, spend down, waiting or residency requirements Category: Eligibility Meaning: A plan condition the patient must satisfy has not been met. Fix: Identify which condition failed. Medicaid spend down in particular can be satisfied later, making the claim payable on resubmission. Prevention: For Medicaid populations, check spend down status at each visit; it changes month to month. ### CO-32 — Our records indicate the patient is not an eligible dependent Category: Eligibility Meaning: The dependent is not shown as covered under the subscriber's policy. Fix: Confirm the relationship and the dependent's status with the subscriber, and check whether a dependent age limit was reached. Prevention: Re-verify dependent coverage at the start of each plan year and around birthdays where age limits apply. In depth: https://vizora.co/denial-codes/co-32 ### CO-33 — Insured has no dependent coverage Category: Eligibility Meaning: The policy covers the subscriber only. Fix: Confirm whether the patient has separate coverage of their own. Otherwise the balance transfers to patient responsibility. Prevention: Verification should return who is covered, not merely that the policy is active. ### CO-35 — Lifetime benefit maximum has been reached Category: Coverage Meaning: The patient has exhausted a lifetime cap under this plan. Fix: Confirm the maximum genuinely applies to this benefit category, then look for secondary coverage. Prevention: Where a plan carries lifetime maxima, track accumulated benefit for affected patients rather than discovering it at denial. ### CO-38 — Services not provided or authorized by designated network or primary care providers Category: Provider eligibility Meaning: The plan required the service to come from, or be authorised by, a designated provider. Fix: Obtain a retroactive referral where the plan permits it, or appeal with evidence the referral requirement was met. Prevention: Confirm at scheduling whether the plan is gatekeeper-based and whether a current referral is on file. ### CO-39 — Services denied at the time authorization was requested Category: Authorization Meaning: Authorisation was sought and refused before the service was delivered. Fix: This is an adverse determination rather than an administrative error. Appeal on medical necessity against the payer's own policy criteria. Prevention: Where authorisation is refused, decide before delivering the service. Proceeding anyway converts a clinical dispute into a write-off. ### CO-40 — Charges do not meet qualifications for emergent or urgent care Category: Coverage Meaning: The payer judged the presentation not to be emergent under its criteria. Fix: Appeal using the prudent layperson standard where it applies, citing presenting symptoms rather than the final diagnosis. Prevention: Ensure documentation records presenting complaint and severity, not just the discharge diagnosis. In depth: https://vizora.co/denial-codes/co-40 ### CO-42 — Charges exceed the fee schedule or maximum allowable amount Category: Contractual Meaning: The billed amount exceeds what the contract allows. The excess is contractual. Fix: Confirm the allowed amount matches your contracted rate. If it is lower than contracted, this is an underpayment to dispute, not a write-off. Prevention: Load contracted rates and compare every payment against them. Underpayments hide inside routine contractual adjustments. ### CO-44 — Prompt-pay discount Category: Contractual Meaning: A contractual discount applied for prompt payment. Fix: Verify the discount matches the contract terms. If correct, no action is needed. Prevention: Confirm prompt-pay terms are loaded correctly so discounts can be validated rather than assumed. ### CO-47 — These diagnoses are not covered, missing or invalid Category: Coding Meaning: The diagnosis submitted is not covered, absent, or not valid on the date of service. Fix: Confirm the diagnosis is valid for that date of service and supports the procedure under payer policy, then resubmit. Prevention: Code set changes take effect by date of service; claims for December services submitted in January need the prior year's codes. ### CO-48 — These procedures are not covered Category: Coverage Meaning: The procedure is excluded from the patient's benefit plan. Fix: Check whether an alternative covered code accurately describes the service. Otherwise obtain an advance beneficiary notice where applicable and bill the patient. Prevention: Check benefit-level coverage during verification, not just active status. ### CO-51 — These are non-covered services because this is a pre-existing condition Category: Coverage Meaning: The plan applies a pre-existing condition exclusion. Fix: Confirm the exclusion is lawful for this plan type; most are prohibited for ACA-compliant plans. Appeal where it does not apply. Prevention: Identify short-term or non-ACA plans at verification, since exclusions that are otherwise rare still apply to them. ### CO-52 — The referring or ordering provider is not eligible to refer or order the service Category: Provider eligibility Meaning: The referring provider is not enrolled or eligible to order this service. Fix: Verify the referring provider's NPI and enrolment status, correct the claim and resubmit. Prevention: Validate referring provider NPIs against the payer's registry before submission rather than accepting whatever the order carries. ### CO-53 — Services by an immediate relative or member of the same household are not covered Category: Coverage Meaning: The rendering provider is related to or lives with the patient. Fix: This exclusion is generally not appealable. Confirm the relationship and write off or bill the patient per plan rules. Prevention: Flag these relationships at scheduling so the encounter is not billed to the plan. ### CO-54 — Multiple physicians or assistants are not covered in this case Category: Coverage Meaning: The payer does not cover the assistant or additional physician billed. Fix: Confirm the assistant surgeon was required and permitted for the procedure, and that the correct modifier was used. Appeal with operative notes. Prevention: Check payer assistant-at-surgery indicators per procedure before the case, not after. ### CO-55 — Procedure or drug is deemed experimental or investigational Category: Coverage Meaning: The payer classifies the service as unproven under its policy. Fix: Appeal with peer-reviewed literature and the payer's own policy criteria. Obtain an advance notice where the patient may be billed. Prevention: Check the payer's medical policy before scheduling anything novel; this denial is predictable from published policy. In depth: https://vizora.co/denial-codes/co-55 ### CO-56 — Procedure has not been deemed proven to be effective Category: Coverage Meaning: Similar to experimental exclusions, applied to services the payer considers unproven. Fix: Appeal against the payer's published coverage criteria with supporting evidence. Prevention: Review medical policy in advance for services that sit at the edge of accepted practice. ### CO-57 — Documentation does not support this level, quantity, length or dosage of service Category: Documentation Meaning: The payer reviewed the record and concluded it supports less than what was billed. Fix: Review the documentation honestly against the level billed. Appeal only where the record genuinely supports it. Prevention: This is a documentation problem rather than a coding one. Templates that prompt for the elements each level requires fix it upstream. ### CO-60 — Outpatient services are not covered when performed within a period before or after inpatient services Category: Bundling Meaning: The outpatient service falls inside a window bundled into an inpatient stay. Fix: Confirm the dates and whether the service was genuinely unrelated to the admission. Appeal with documentation where it was. Prevention: Check for recent or upcoming admissions before billing outpatient services for hospitalised patients. ### CO-61 — Adjusted for failure to obtain second surgical opinion Category: Authorization Meaning: The plan required a second opinion that was not obtained. Fix: Confirm the requirement applied. Where it did, a retroactive opinion is rarely accepted; appeal on medical urgency where applicable. Prevention: Identify plans with second-opinion requirements during verification for elective surgical scheduling. ### CO-62 — Payment denied or reduced for absence of, or exceeded, pre-certification Category: Authorization Meaning: Pre-certification was missing or the approved amount was exceeded. Fix: Establish whether authorisation existed and what it covered. Where the service exceeded the approved scope, request retroactive extension. Prevention: Track approved units and date ranges, not just authorisation numbers. Exceeding scope denies as surely as having none. In depth: https://vizora.co/denial-codes/co-62 ### CO-63 — Correction to a prior claim Category: Contractual Meaning: An adjustment reflecting a correction the payer applied to earlier processing. Fix: Reconcile against the original claim to confirm the net result is correct. Usually informational. Prevention: Post adjustments against the original claim rather than as standalone transactions so the audit trail survives. ### CO-65 — Procedure code was incorrect; this payment reflects the correct code Category: Coding Meaning: The payer re-coded the claim and paid the substituted code. Fix: Confirm the substituted code accurately reflects the service. Where it undervalues documented work, appeal with the record. Prevention: Payer re-coding is worth tracking as a pattern. Repeated substitution on one code usually indicates a documentation gap. ### CO-95 — Plan procedures not followed Category: Coverage Meaning: A required plan process — referral, notification, network rule — was not followed. Fix: Identify which procedure was missed and whether it can be satisfied retroactively. Prevention: Document plan-specific process requirements per payer rather than relying on staff memory. ### CO-100 — Payment made to patient, insured or responsible party Category: Patient responsibility Meaning: The payer sent payment directly to the patient rather than the practice. Fix: Bill the patient for the amount paid to them, referencing the payer's payment. Check whether an assignment of benefits was on file. Prevention: Obtain assignment of benefits at registration, and identify non-assigning plans at verification. ### CO-101 — Predetermination: anticipated payment upon completion of services Category: Coverage Meaning: Informational — a predetermination of benefits rather than an adjudicated claim. Fix: No action beyond confirming the eventual claim adjudicates as predicted. Prevention: Predeterminations are not guarantees of payment; verify benefits independently. ### CO-107 — The related or qualifying claim was not identified on this claim Category: Bundling Meaning: A code requiring a related primary service was billed without it. Fix: Identify the qualifying procedure and confirm it was billed, then resubmit with correct linkage. Prevention: Add-on codes and services requiring a qualifying primary should be validated as pairs during scrubbing. In depth: https://vizora.co/denial-codes/co-107 ### CO-108 — Rent or purchase guidelines were not met Category: Coverage Meaning: Durable medical equipment rental or purchase rules were not satisfied. Fix: Confirm whether the item should have been billed as rental or purchase and whether the rental cap was reached. Prevention: Track DME rental months against caps; the transition point is a recurring denial source. ### CO-110 — Billing date predates service date Category: Data quality Meaning: The claim's billing date is earlier than the date of service. Fix: Correct the dates and resubmit. Usually a keying or system configuration error. Prevention: Check claim-build date logic where this recurs; it is a system problem rather than a staff one. ### CO-111 — Not covered unless the provider accepts assignment Category: Provider eligibility Meaning: The plan pays only participating providers who accept assignment. Fix: Confirm your participation status and assignment election with this payer. Prevention: Maintain a current record of which payers you accept assignment with, per provider. ### CO-112 — Service not furnished directly to the patient or not documented Category: Documentation Meaning: The payer found no record of direct service to the patient. Fix: Produce documentation showing the service was delivered directly. Appeal with the record. Prevention: Ensure services delivered by staff under supervision meet the payer's incident-to or supervision documentation rules. ### CO-114 — Procedure or product not approved by the Food and Drug Administration Category: Coverage Meaning: The item billed lacks FDA approval for the indication. Fix: Confirm the product and indication. Appeal where approval exists for the use billed. Prevention: Check FDA status and payer policy before administering high-cost drugs or devices. ### CO-115 — Procedure postponed, cancelled or delayed Category: Coding Meaning: The procedure did not proceed as billed. Fix: Bill the discontinued or reduced service with the appropriate modifier reflecting what was actually performed. Prevention: Establish a process for cancelled procedures so partial services are billed correctly rather than in full or not at all. ### CO-116 — The advance indemnification notice did not comply with requirements Category: Documentation Meaning: An advance beneficiary notice was defective, so the patient cannot be billed. Fix: Review the notice against requirements. A defective notice generally cannot be cured after the fact. Prevention: Use current forms, complete every field, obtain the signature before the service, and retain the original. ### CO-117 — Transportation is only covered to the closest appropriate facility Category: Coverage Meaning: Transport went beyond the nearest facility able to provide care. Fix: Appeal with documentation that closer facilities could not provide the required level of care. Prevention: Document the clinical reason for facility selection at the time of transport. ### CO-125 — Submission or billing errors Category: Data quality Meaning: A general submission error, usually accompanied by a remark code naming the field. Fix: Read the accompanying RARC to identify the specific error, correct it and resubmit. Prevention: Like CO-16, track which remark codes accompany this. They cluster around a small number of repeatable gaps. ### CO-129 — Prior processing information appears incorrect Category: Data quality Meaning: Information about prior payer adjudication does not reconcile. Fix: Re-verify the primary payer's payment and adjustment amounts and resubmit with corrected coordination of benefits data. Prevention: Transmit complete primary EOB data electronically rather than re-keying totals. ### CO-136 — Failure to follow the prior payer's coverage rules Category: Coverage Meaning: The secondary payer found the primary's rules were not followed. Fix: Establish what the primary required, correct with the primary first where possible, then rebill the secondary. Prevention: Resolve primary adjudication fully before billing secondary; a secondary claim inherits the primary's problems. ### CO-138 — Appeal procedures not followed or time limits not met Category: Timely filing Meaning: An appeal was filed late or through the wrong channel. Fix: Check whether a further level of appeal remains available. Otherwise the determination stands. Prevention: Track appeal deadlines separately from filing deadlines. They are shorter and start at the denial date. ### CO-141 — Claim spans eligible and ineligible periods of coverage Category: Eligibility Meaning: Part of the service period falls outside coverage. Fix: Split the claim so each portion is billed to the payer responsible for that period. Prevention: Verify coverage for the full span of multi-day services, not just the admission date. ### CO-142 — Monthly Medicaid patient liability amount Category: Patient responsibility Meaning: A Medicaid patient liability amount was applied. Fix: Bill the patient for the applied liability amount where state rules permit. Prevention: Check patient liability at each visit for Medicaid populations; it is recalculated monthly. ### CO-146 — Diagnosis was invalid for the dates of service reported Category: Coding Meaning: The diagnosis code did not exist or was not valid on the date of service. Fix: Recode using the code set in effect on the date of service and resubmit. Prevention: ICD-10-CM updates each October 1. Claims for services before that date must use the prior code set. ### CO-147 — Provider contracted rate expired or is not on file Category: Contractual Meaning: The payer has no current contracted rate for the provider. Fix: Contact provider relations to confirm contract status and effective dates, then request reprocessing. Prevention: Track contract expiry and renewal dates. An expired contract silently converts in-network claims to out-of-network. In depth: https://vizora.co/denial-codes/co-147 ### CO-148 — Information from another provider was not provided or was insufficient Category: Documentation Meaning: A referring or prior provider did not supply required information. Fix: Identify what was needed and obtain it from the other provider, then resubmit. Prevention: Where you depend on outside documentation, request it before submitting rather than after denial. ### CO-149 — Lifetime benefit maximum has been reached for this service category Category: Coverage Meaning: A category-specific lifetime maximum is exhausted. Fix: Confirm the maximum and category, then check for secondary coverage. Prevention: Track category maxima for patients receiving capped services over long courses of care. ### CO-150 — Documentation does not support this level of service Category: Documentation Meaning: The payer determined the record supports a lower level than billed. Fix: Review the note against the level billed. Appeal only where the documentation genuinely supports it. Prevention: Address this through documentation templates rather than through coding policy; the record is what failed. In depth: https://vizora.co/denial-codes/co-150 ### CO-152 — Documentation does not support this length of service Category: Documentation Meaning: Time-based billing was not supported by the record. Fix: Produce documentation of actual time, including start and stop times where the code requires them. Prevention: For time-based codes, record the total explicitly. An appointment length is not documentation of service time. ### CO-153 — Documentation does not support this dosage Category: Documentation Meaning: The dosage billed exceeds what the record supports. Fix: Verify units against the dose actually administered and correct if the unit calculation was wrong. Prevention: Drug unit calculation errors are systematic. Validate units per code against dose, not per vial. ### CO-154 — Documentation does not support this day's supply Category: Documentation Meaning: The supply quantity billed is not supported. Fix: Confirm the quantity dispensed and correct the claim. Prevention: Validate days-supply calculations at the point of dispensing. ### CO-155 — Patient refused the service or procedure Category: Coverage Meaning: The payer records the patient as having declined the service. Fix: Confirm what was actually delivered and bill only that. Where the service was delivered, appeal with documentation. Prevention: Document patient refusal explicitly so partial encounters are billed accurately. ### CO-163 — Attachment or other documentation referenced on the claim was not received Category: Documentation Meaning: The claim referenced an attachment the payer never received. Fix: Resend the attachment through the payer's required channel and reference the claim number. Prevention: Confirm the payer's accepted attachment method. Faxed records to a payer expecting electronic attachments are treated as never sent. ### CO-164 — Attachment or documentation was not received in a timely fashion Category: Timely filing Meaning: Documentation arrived after the payer's deadline. Fix: Check whether a further appeal level remains. Submit immediately with proof of the original send where available. Prevention: Track documentation deadlines on the same list as filing deadlines. ### CO-165 — Referral absent or exceeded Category: Authorization Meaning: A required referral was missing or its limits were exceeded. Fix: Obtain a retroactive referral where the plan permits, or appeal with evidence a valid referral existed. Prevention: Track referral visit counts and expiry dates. Referrals exhaust mid-course exactly like authorisations. In depth: https://vizora.co/denial-codes/co-165 ### CO-166 — Services submitted after the payer's responsibility for processing claims ended Category: Timely filing Meaning: The plan's claim-processing responsibility ended before submission. Fix: Identify the payer responsible for the period and rebill. Prevention: Verify plan termination dates, particularly for patients moving between plans mid-year. ### CO-171 — Payment denied when performed or billed by this type of provider in this type of facility Category: Provider eligibility Meaning: The provider type and facility combination is not payable. Fix: Confirm the place of service and provider taxonomy are correct, then resubmit if either was wrong. Prevention: Validate place-of-service and taxonomy pairs per payer during scrubbing. ### CO-172 — Payment adjusted when performed or billed by a provider of this specialty Category: Provider eligibility Meaning: The payer adjusts payment based on the billing provider's specialty. Fix: Verify the taxonomy submitted matches the provider's enrolled specialty with this payer. Prevention: Taxonomy mismatches are enrolment configuration errors and recur until corrected at the payer. ### CO-173 — Service or equipment was not prescribed by a physician Category: Documentation Meaning: A required prescription or order is missing. Fix: Obtain the order and resubmit. Orders generally must predate the service. Prevention: Confirm a valid, dated order exists before delivering orderable services or equipment. ### CO-174 — Service was not prescribed prior to delivery Category: Documentation Meaning: The order postdates the service. Fix: Verify the order date. A retroactive order will not usually cure this. Prevention: Ensure orders are dated and signed before delivery, not reconstructed afterwards. ### CO-175 — Prescription is incomplete Category: Documentation Meaning: The prescription lacks required elements. Fix: Obtain a complete prescription with all required elements and resubmit. Prevention: Use a prescription template that prompts for every element the payer requires. ### CO-176 — Prescription is not current Category: Documentation Meaning: The prescription has expired. Fix: Obtain a current prescription. Services delivered after expiry are generally not payable. Prevention: Track prescription expiry dates for ongoing services alongside authorisation dates. ### CO-177 — Patient has not met the required eligibility requirements Category: Eligibility Meaning: A plan eligibility condition is unmet. Fix: Identify the specific condition and whether it can be satisfied retroactively. Prevention: Verify eligibility conditions, not just active status, for plans with qualifying requirements. ### CO-178 — Patient has not met the required spend down requirements Category: Eligibility Meaning: Medicaid spend down has not been satisfied. Fix: Check spend down status; once met, the claim often becomes payable on resubmission. Prevention: Check spend down at each visit for affected Medicaid patients. It changes monthly. ### CO-179 — Patient has not met the required waiting requirements Category: Eligibility Meaning: A plan waiting period has not elapsed. Fix: Confirm the waiting period end date and rebill after it passes if filing limits allow. Prevention: Capture waiting period end dates at verification for newly enrolled patients. ### CO-180 — Patient has not met the required residency requirements Category: Eligibility Meaning: A residency condition for the plan is unmet. Fix: Verify the patient's address of record with the plan and correct if wrong. Prevention: Confirm the address on the payer's record matches the patient's actual residence at verification. ### CO-182 — Procedure modifier was invalid on the date of service Category: Coding Meaning: The modifier did not exist or was not valid on that date. Fix: Recode with a modifier valid for the date of service and resubmit. Prevention: Modifier sets change with the annual updates. Validate modifiers by date of service, not by current validity. ### CO-183 — The referring provider is not eligible to refer the service billed Category: Provider eligibility Meaning: The referring provider cannot refer this service under payer rules. Fix: Confirm the referring provider's NPI, enrolment and eligibility to refer, then correct and resubmit. Prevention: Validate referring providers against the payer registry before submission. In depth: https://vizora.co/denial-codes/co-183 ### CO-184 — The prescribing or ordering provider is not eligible to order the service Category: Provider eligibility Meaning: The ordering provider is not eligible or enrolled. Fix: Verify the ordering provider's NPI and enrolment status and correct the claim. Prevention: Maintain a validated list of ordering providers you routinely receive orders from. ### CO-185 — The rendering provider is not eligible to perform the service billed Category: Provider eligibility Meaning: The rendering provider is not enrolled or eligible for this service. Fix: Confirm the provider's enrolment and effective date with this payer. Frequently a credentialing gap rather than a coding error. Prevention: Do not schedule a provider with a payer until enrolment is effective and loaded. This denial is a credentialing symptom. In depth: https://vizora.co/denial-codes/co-185 ### CO-186 — Level of care change adjustment Category: Coverage Meaning: Payment adjusted for a change in the level of care. Fix: Confirm the level of care billed matches the record and appeal where documentation supports the higher level. Prevention: Document level-of-care changes contemporaneously so the billed level is supportable. ### CO-188 — This product is only covered when used according to FDA recommendations Category: Coverage Meaning: Off-label or non-conforming use. Fix: Appeal with literature supporting the use where the payer's policy allows off-label coverage. Prevention: Check payer drug policy for covered indications before administration. ### CO-189 — An unlisted procedure code was billed when a specific code exists Category: Coding Meaning: An unlisted or not-otherwise-classified code was used where a specific code is available. Fix: Identify the specific code that describes the service and resubmit. Prevention: Review unlisted-code usage periodically. New specific codes appear each January and make prior unlisted billing incorrect. ### CO-190 — Payment is included in the allowance for a Skilled Nursing Facility qualified stay Category: Bundling Meaning: The service is bundled into a SNF stay under consolidated billing. Fix: Confirm the patient's SNF status on the date of service. Where bundled, bill the facility rather than the payer. Prevention: Check SNF status at registration; consolidated billing catches practices repeatedly. ### CO-192 — Non standard adjustment code from paper remittance Category: Data quality Meaning: A paper remittance carried a non-standard code. Fix: Contact the payer for the specific reason. The code itself carries no actionable detail. Prevention: Move to electronic remittance advice where possible; paper remittances lose adjudication detail. ### CO-193 — Original payment decision is being maintained on review Category: Coverage Meaning: An appeal was reviewed and the original decision upheld. Fix: Consider the next appeal level, external review, or accept the determination. Repeating the same argument will not change it. Prevention: Where appeals are upheld repeatedly on one code, the problem is usually upstream documentation rather than the appeal. ### CO-194 — Anesthesia performed by the operating physician or assistant Category: Bundling Meaning: Anesthesia billed by the surgeon or assistant is not separately payable. Fix: Confirm who provided anesthesia. Where an independent provider did, correct the billing provider and resubmit. Prevention: Ensure anesthesia is billed under the correct rendering provider, particularly for procedural sedation. ### CO-196 — Claim denied based on the prior payer's coverage determination Category: Coverage Meaning: The secondary payer followed the primary's denial. Fix: Resolve the primary denial first. The secondary will generally not pay while the primary denial stands. Prevention: Work primary denials before billing secondary; the secondary inherits the outcome. ### CO-199 — Revenue code and procedure code do not match Category: Data quality Meaning: The revenue code and CPT or HCPCS code are incompatible. Fix: Correct the revenue code to one valid for the procedure and resubmit. Prevention: Maintain a validated revenue-code-to-procedure mapping in the charge master. ### CO-200 — Expenses incurred during a lapse in coverage Category: Eligibility Meaning: The service fell within a coverage gap, often for non-payment of premium. Fix: Confirm the lapse dates. Where coverage was reinstated retroactively, resubmit after reinstatement. Prevention: Grace-period status is visible at verification for exchange plans; check it rather than assuming active means paid. ### CO-201 — Patient is responsible through a set aside arrangement Category: Liability and workers comp Meaning: A workers compensation set-aside or similar arrangement applies. Fix: Bill the set-aside administrator or the patient per the arrangement's terms. Prevention: Identify set-aside arrangements at registration for workers compensation patients. ### CO-202 — Non-covered personal comfort or convenience services Category: Coverage Meaning: The item is a comfort or convenience service the plan excludes. Fix: Bill the patient where an advance notice was properly obtained. Prevention: Identify non-covered comfort items in advance and obtain written patient acknowledgement. ### CO-203 — Discontinued or reduced service Category: Coding Meaning: The service was not completed as billed. Fix: Bill with the appropriate discontinued or reduced service modifier reflecting what was performed. Prevention: Establish a workflow for discontinued procedures so they are coded to what actually happened. ### CO-206 — National Provider Identifier missing Category: Data quality Meaning: A required NPI was absent from the claim. Fix: Identify which NPI is missing — billing, rendering, referring or facility — and resubmit. Prevention: Validate all NPI fields during scrubbing rather than only the billing NPI. ### CO-207 — National Provider Identifier invalid format Category: Data quality Meaning: An NPI failed format validation. Fix: Correct the NPI. A valid NPI is ten digits and passes a check-digit test. Prevention: Apply NPI format validation at entry so invalid numbers cannot be saved. ### CO-208 — National Provider Identifier not matched Category: Data quality Meaning: The NPI does not match the payer's record for the provider. Fix: Verify the NPI against the payer's enrolment record, not just the national registry. Prevention: NPI mismatches usually indicate an enrolment record that was never updated. Fix at the payer, not on the claim. ### CO-209 — Per regulatory or other agreement, the provider cannot collect this amount Category: Contractual Meaning: A regulatory or contractual provision bars billing the patient. Fix: Confirm the provision applies, then write off. Billing the patient may violate the agreement. Prevention: Understand balance-billing restrictions per payer and plan type before billing patients. ### CO-210 — Pre-certification not received in a timely fashion Category: Authorization Meaning: Authorisation was obtained but not within the required window. Fix: Appeal where the delay was payer-caused or where clinical urgency prevented advance authorisation. Prevention: Track authorisation request deadlines, not just requirements. Late authorisation denies like missing authorisation. ### CO-211 — National Drug Codes not eligible for rebate are not covered Category: Coverage Meaning: The NDC billed is not covered under the plan's rebate arrangements. Fix: Verify the NDC matches the product administered and check the plan's formulary. Prevention: Validate NDCs against the plan formulary before administering high-cost drugs. ### CO-213 — Non-compliance with physician self-referral prohibition Category: Provider eligibility Meaning: A Stark or self-referral policy issue was identified. Fix: This requires compliance review rather than a billing correction. Do not simply resubmit. Prevention: Referral relationships with financial interests require compliance review before billing, not after. ### CO-214 — Workers compensation claim adjudicated as non-compensable Category: Liability and workers comp Meaning: The workers compensation carrier denied compensability. Fix: Bill the patient's health plan, noting the workers compensation denial. Prevention: Obtain the compensability determination before billing; carriers deny compensability more often than expected. ### CO-216 — Based on the findings of a review organization Category: Documentation Meaning: A review organisation determined the claim should not pay as billed. Fix: Request the review findings and appeal against the specific determination. Prevention: Review-organisation denials cluster by service. Track them to find the documentation gap driving them. ### CO-220 — The applicable fee schedule does not contain the billed code Category: Contractual Meaning: The code is absent from the payer's fee schedule. Fix: Confirm the code is correct and current, then contact provider relations to have it loaded. Prevention: New codes are frequently missing from payer fee schedules in January. Test-bill high-volume new codes early. ### CO-222 — Exceeds the contracted maximum number of hours, days or units for this period Category: Contractual Meaning: A contractual unit or frequency cap was exceeded. Fix: Confirm the cap and whether an exception process exists. Appeal with medical necessity where one does. Prevention: Track contractual caps per patient per period for services delivered in courses. In depth: https://vizora.co/denial-codes/co-222 ### CO-223 — Adjustment for mandated federal, state or local law Category: Contractual Meaning: A regulatory adjustment applied. Fix: Confirm the adjustment is correct. Generally not appealable. Prevention: Understand which regulatory adjustments apply to your payer mix so they are expected rather than investigated. ### CO-224 — Patient identification compromised by identity theft Category: Data quality Meaning: The payer has flagged the identity as compromised. Fix: Do not resubmit routinely. Contact the payer's special investigations unit and follow their process. Prevention: Verify identity at registration with photo ID for new patients. ### CO-226 — Information requested from the billing or rendering provider was not provided or was insufficient Category: Documentation Meaning: The payer requested information from you and did not receive an adequate response. Fix: Locate the original request and respond with exactly what was asked, referencing the claim. Prevention: Log payer information requests centrally with due dates. Unanswered requests become permanent denials. ### CO-227 — Information requested from the patient was not provided Category: Documentation Meaning: The payer asked the patient for information and did not receive it. Fix: Contact the patient to prompt their response, then request reprocessing. Prevention: Where a payer commonly requests patient information such as coordination of benefits updates, prompt patients proactively. ### CO-228 — Denied for failure to supply requested information to a previous payer Category: Documentation Meaning: A prior payer's information request went unanswered. Fix: Resolve the outstanding request with the previous payer first, then rebill. Prevention: Do not let primary payer requests age; they block secondary payment as well as primary. ### CO-231 — Mutually exclusive procedures cannot be done on the same day Category: Bundling Meaning: The procedures billed cannot clinically be performed together. Fix: Confirm what was actually performed. Where both were genuinely done, use the appropriate distinct-service modifier if the edit permits. Prevention: Check mutually exclusive edits during scrubbing; unlike component edits, many permit no modifier override. In depth: https://vizora.co/denial-codes/co-231 ### CO-233 — Services related to a hospital-acquired condition or preventable medical error Category: Coverage Meaning: The payer attributes the service to a preventable condition. Fix: Confirm the attribution. These are generally not payable and not billable to the patient. Prevention: Present-on-admission documentation determines this; ensure it is captured accurately. ### CO-237 — Legislated or regulatory penalty Category: Contractual Meaning: A penalty applied under legislation or regulation. Fix: Identify the specific penalty and whether it can be avoided going forward. Prevention: Penalties usually attach to reporting or participation requirements. Address the underlying requirement. ### CO-239 — Claim spans eligible and ineligible periods; rebill separate claims Category: Eligibility Meaning: The service period crosses a coverage boundary. Fix: Split the claim at the coverage boundary and submit separate claims for each period. Prevention: Check coverage across the full date span for multi-day services before billing. ### CO-240 — The diagnosis is inconsistent with the patient's birth weight Category: Coding Meaning: A birth-weight-restricted diagnosis conflicts with the recorded weight. Fix: Verify the recorded birth weight and the diagnosis, and correct whichever is wrong. Prevention: Capture birth weight accurately for neonatal claims; it drives both coding and payment. ### CO-242 — Services not provided by network or primary care providers Category: Provider eligibility Meaning: The rendering provider was out of network for a plan requiring network care. Fix: Verify network status for the specific plan, not just the carrier. Appeal where no in-network provider was available. Prevention: Verify network participation at the plan level during eligibility checks; carrier-level participation is not sufficient. ### CO-243 — Services not authorized by network or primary care providers Category: Authorization Meaning: A network gatekeeper did not authorise the service. Fix: Obtain retroactive authorisation where the plan permits, or appeal. Prevention: Identify gatekeeper plans at scheduling and confirm authorisation before the visit. ### CO-246 — This non-payable code is for required reporting only Category: Contractual Meaning: A reporting-only code was billed and carries no payment. Fix: No action needed. The code exists for reporting rather than reimbursement. Prevention: Understand which quality and reporting codes carry no payment so they are not worked as denials. ### CO-249 — This claim has been identified as a readmission Category: Bundling Meaning: The admission is treated as a readmission and bundled. Fix: Confirm the readmission determination and appeal where the second admission was clinically unrelated. Prevention: Document the clinical relationship between admissions where readmission within the window is likely. ### CO-250 — The attachment received was the incorrect document Category: Documentation Meaning: The payer received documentation that did not match the request. Fix: Identify what was actually requested and send exactly that, referencing the request. Prevention: Match documentation to the specific request rather than sending the full record by default. ### CO-251 — The attachment received was incomplete or deficient Category: Documentation Meaning: Documentation arrived but was inadequate. Fix: Determine what was missing and send a complete response. Prevention: Review documentation against the request before sending, not after the second denial. ### CO-252 — An attachment is required to adjudicate this claim Category: Documentation Meaning: The claim requires supporting documentation that was not submitted. Fix: Submit the required attachment through the payer's accepted channel and reference the claim number. Prevention: Identify which services routinely require attachments for each payer and attach at submission. In depth: https://vizora.co/denial-codes/co-252 ### CO-253 — Sequestration reduction in federal payment Category: Contractual Meaning: A statutory percentage reduction applied to Medicare payment. Fix: No action. This is a mandated reduction and is not billable to the patient. Prevention: Expected on Medicare remittances. Configure posting so it is not worked as a denial. In depth: https://vizora.co/denial-codes/co-253 ### CO-256 — Service not payable per managed care contract Category: Contractual Meaning: The managed care contract excludes payment for this service. Fix: Review the contract terms. Where the service should be covered, dispute through provider relations. Prevention: Know what your managed care contracts exclude before delivering excluded services. ### CO-261 — The procedure is inconsistent with the patient's history Category: Coding Meaning: The service conflicts with the patient's documented history. Fix: Confirm the history on file and appeal with clinical documentation where the service was appropriate. Prevention: Ensure history is documented accurately where it drives coverage, such as for screening frequency. ### CO-272 — Coverage or program guidelines were not met Category: Coverage Meaning: A program requirement was unmet. Fix: Identify the specific guideline and whether it can be satisfied. Prevention: Review program guidelines for services with participation conditions before delivering them. ### CO-273 — Coverage or program guidelines were exceeded Category: Coverage Meaning: A frequency or quantity guideline was exceeded. Fix: Confirm the applicable limit and appeal with medical necessity where exceeding it was justified. Prevention: Track frequency limits for screening and preventive services; they are the most commonly exceeded. ### CO-275 — Prior payer's patient responsibility not covered Category: Patient responsibility Meaning: The secondary payer will not cover the primary's patient responsibility. Fix: Bill the patient for the remaining responsibility where permitted. Prevention: Set expectations with patients holding secondary coverage that does not absorb all cost sharing. ### CO-276 — Services denied by the prior payer are not covered by this payer Category: Coverage Meaning: The secondary follows the primary's denial. Fix: Resolve the primary denial first; the secondary will not pay while it stands. Prevention: Always work the primary denial before touching the secondary claim. ### CO-284 — Authorization number may be valid but does not apply to the billed services Category: Authorization Meaning: A valid authorisation exists but does not cover what was billed. Fix: Compare the authorised procedures and dates against what was billed, and request an amended authorisation. Prevention: Store authorisations against specific procedures and date ranges, not just against the patient. ### CO-286 — Appeal time limits not met Category: Timely filing Meaning: The appeal was filed after the deadline. Fix: Check whether a further level remains available. Otherwise the determination is final. Prevention: Appeal deadlines are shorter than filing deadlines and start at the denial date. Track them separately. ### CO-287 — Referral exceeded Category: Authorization Meaning: The referral's visit or service limits were exceeded. Fix: Obtain an extended referral and request reprocessing where the plan permits. Prevention: Track referral visit counts the way authorisation units are tracked. ### CO-288 — Referral absent Category: Authorization Meaning: A required referral was not on file. Fix: Obtain a retroactive referral where permitted, or appeal with evidence one existed. Prevention: Confirm referral presence at scheduling for gatekeeper plans. ### CO-296 — Authorization number may be valid but does not apply to the provider Category: Authorization Meaning: The authorisation was issued for a different provider. Fix: Confirm which provider the authorisation names and request an amendment or a new authorisation. Prevention: Authorisations are provider-specific. A group authorisation does not automatically cover every rendering provider. ### CO-299 — The billing provider is not eligible to receive payment for the service billed Category: Provider eligibility Meaning: The billing provider cannot be paid for this service. Fix: Verify the billing provider's enrolment and the service's payability under that enrolment. Prevention: Usually an enrolment or taxonomy configuration issue requiring correction at the payer. ### CO-302 — Authorization time limit has expired Category: Authorization Meaning: The authorisation expired before the service was delivered. Fix: Request a new authorisation. Services delivered after expiry are generally not payable retroactively. Prevention: Track authorisation expiry dates alongside unit counts; both exhaust independently. ### CO-A1 — Claim or service denied Category: Coverage Meaning: A general denial. Always accompanied by a remark code carrying the actual reason. Fix: Read the accompanying RARC. A1 alone provides no actionable information. Prevention: Where A1 recurs, categorise by the accompanying remark code to find the underlying pattern. ### CO-B10 — Allowed amount reduced because a component of the basic procedure was already paid Category: Bundling Meaning: A component of the procedure was separately paid earlier. Fix: Identify the previously paid component and confirm the reduction is correct. Prevention: Check for previously billed components before submitting global procedures. In depth: https://vizora.co/denial-codes/co-b10 ### CO-B12 — Services not documented in the patient's medical records Category: Documentation Meaning: No documentation supports the service. Fix: Locate the documentation and appeal. Where none exists, the service is not billable. Prevention: Reconcile billed services against documented encounters before submission. ### CO-B13 — Previously paid Category: Data quality Meaning: The service was already paid on an earlier claim. Fix: Verify the prior payment before appealing. Often a duplicate submission. Prevention: Check claim status before resubmitting rather than refiling. ### CO-B14 — Only one visit or consultation per physician per day is covered Category: Bundling Meaning: Multiple same-day visits by one physician are not separately payable. Fix: Where visits were genuinely distinct, appeal with documentation and the appropriate modifier. Prevention: Combine same-day encounters into a single appropriately levelled visit where clinically accurate. ### CO-B16 — New patient qualifications were not met Category: Coding Meaning: The patient did not meet the new-patient definition. Fix: Rebill as an established patient. New patient generally requires no face-to-face service from the practice's same specialty within three years. Prevention: Check patient history across the whole group and specialty before assigning a new patient code. ### CO-B18 — This procedure code and modifier were invalid on the date of service Category: Coding Meaning: The code and modifier combination was not valid on that date. Fix: Verify both against the code set in effect on the date of service and correct. Prevention: Validate code and modifier pairs by date of service, especially in January and October. ### CO-B20 — Procedure was partially or fully furnished by another provider Category: Bundling Meaning: Another provider performed part or all of the service. Fix: Confirm what your provider performed and bill only that portion with the appropriate modifier. Prevention: Coordinate billing where care is shared between providers to avoid overlapping claims. ### CO-B22 — Payment adjusted based on the diagnosis Category: Coverage Meaning: Payment was adjusted according to the diagnosis submitted. Fix: Confirm the diagnosis accurately reflects the encounter and supports the service billed. Prevention: Ensure diagnosis specificity supports the payment expected; vague codes reduce payment on some methodologies. ### CO-B23 — Procedure billed is not authorized per your CLIA certification Category: Provider eligibility Meaning: The laboratory test exceeds the practice's CLIA certificate level. Fix: Verify your CLIA certificate covers the test performed. Where it does not, the test is not billable by your practice. Prevention: Match your test menu to your CLIA certificate level, and include the CLIA number on claims requiring it. ### CO-D18 — Claim or service has missing diagnosis information Category: Data quality Meaning: A required diagnosis is absent. Fix: Add the diagnosis and resubmit. Prevention: Validate diagnosis presence and pointer linkage during scrubbing. ### CO-D21 — These diagnoses are missing or invalid Category: Coding Meaning: Diagnosis codes are absent or not valid. Fix: Correct the diagnosis codes for the date of service and resubmit. Prevention: Apply date-of-service diagnosis validation in the scrubber. ### CO-P12 — Workers compensation jurisdictional fee schedule adjustment Category: Liability and workers comp Meaning: Payment adjusted to a state workers compensation fee schedule. Fix: Verify the adjustment against the applicable state fee schedule. Prevention: Load state workers compensation fee schedules so payments can be validated rather than assumed. ### CO-P13 — Payment reduced or denied based on workers compensation jurisdictional regulations Category: Liability and workers comp Meaning: State workers compensation rules reduced or denied payment. Fix: Review the applicable state regulation and appeal through the state process where available. Prevention: Workers compensation appeals follow state processes rather than payer appeal rules. Know the process per state. Authoritative code lists: https://x12.org/codes/claim-adjustment-reason-codes and https://x12.org/codes/remittance-advice-remark-codes --- ## CPT and HCPCS modifiers Each entry states when the modifier applies and when it does not. The misuse cases are the ones that produce denials and audit findings. ### Modifier 25 — Significant, separately identifiable evaluation and management service by the same physician on the same day of a procedure Category: Evaluation and management Modifier 25 reports an evaluation and management service performed on the same day as a procedure, where the evaluation went beyond the assessment inherent in performing that procedure. Every procedure includes some pre-service evaluation; modifier 25 asserts that additional, separately identifiable work occurred. Use it when: A patient attends for a scheduled procedure and is also evaluated for an unrelated complaint; A new problem is identified and assessed during a visit at which a procedure is performed; A preventive visit during which a distinct problem requires its own assessment and plan; An evaluation that leads to the decision to perform a minor procedure the same day Do not use it when: The only evaluation performed was the assessment inherent in the procedure itself; A patient arrives for a scheduled injection, receives it, and leaves; A brief look at the site immediately before treating it; The evaluation and the procedure address the same problem with no additional work Full guide: https://vizora.co/modifiers/25 ### Modifier 59 — Distinct procedural service Category: Evaluation and management Modifier 59 identifies a procedure as distinct from another performed the same day, overriding an edit that would otherwise bundle them. It is the modifier of last resort — where a more specific X modifier or an anatomic modifier describes the distinction, that one should be used instead. Use it when: Two procedures performed at separate encounters on the same day; Procedures on different anatomic sites or separate organs; A diagnostic procedure that led to the decision to perform a therapeutic one; Only where no more specific modifier describes the distinction Do not use it when: To clear a bundling edit where the services were genuinely one service; Where an X modifier more precisely describes why the services were distinct; Where an anatomic modifier such as a side or digit indicator applies; As a routine addition to any claim returning a bundling denial Full guide: https://vizora.co/modifiers/59 ### Modifier 26 — Professional component Category: Component Modifier 26 reports the physician's interpretation and written report for a diagnostic service, separately from the equipment, supplies and technical staff that produced it. It applies when the interpreting physician does not own the equipment used. Use it when: A radiologist interprets studies performed at a hospital or another facility; A cardiologist reads a study performed on equipment owned by someone else; A pathologist interprets a specimen processed at another laboratory; Any diagnostic service where the practice supplies the read but not the equipment Do not use it when: The practice owns the equipment and performs the interpretation — bill globally with no modifier; The code has no professional and technical split; Reporting the technical side, which uses the technical component modifier instead Full guide: https://vizora.co/modifiers/26 ### Modifier TC — Technical component Category: Component Modifier TC reports the equipment, supplies, technical staff and facility overhead used to produce a diagnostic service, separately from the physician's interpretation. It applies when the practice performs the study but the read is supplied by someone else. Use it when: A physician office performs imaging and sends the study out for interpretation; A facility owns the equipment while an outside group supplies the reads; An independent diagnostic testing facility performing studies read elsewhere Do not use it when: The practice both performs and interprets — bill globally with no modifier; Reporting the interpretation, which uses the professional component modifier; On codes with no professional and technical split Full guide: https://vizora.co/modifiers/tc ### Modifier 50 — Bilateral procedure Category: Multiple and bilateral Modifier 50 reports a procedure performed on both sides of the body during the same session, where the code itself describes a unilateral service. It does not apply to codes that are already inherently bilateral, and appending it to one overbills. Use it when: A unilateral procedure code performed on both left and right sides in the same session; Where the payer's convention is a single line with modifier 50 rather than two lines Do not use it when: The code descriptor already includes both sides — it is inherently bilateral; The payer requires two lines with side indicators instead; Procedures on paired structures that are not truly bilateral, such as two different digits on one foot Full guide: https://vizora.co/modifiers/50 ### Modifier 51 — Multiple procedures Category: Multiple and bilateral Modifier 51 identifies the second and subsequent procedures performed during the same session, triggering multiple procedure payment reduction. Many payers now append it automatically during adjudication, which makes manual use unnecessary and occasionally harmful. Use it when: Multiple distinct procedures in one session, on payers that require it manually; On the lower-valued procedures, never on the primary one Do not use it when: On add-on codes, which are exempt from multiple procedure reduction by design; On codes designated as modifier 51 exempt; Where the payer appends it during adjudication, which most now do; On the highest-valued procedure of the session Full guide: https://vizora.co/modifiers/51 ### Modifier 24 — Unrelated evaluation and management service by the same physician during a postoperative period Category: Global period Modifier 24 reports an evaluation and management service during a surgical global period that is unrelated to the surgery. Routine postoperative care is included in the surgical payment; care for a different problem is not, and this modifier says so. Use it when: An E/M during a global period addressing a condition unrelated to the surgery; Treatment of a new problem arising during the postoperative window; An unrelated chronic condition managed during a postoperative visit Do not use it when: Routine postoperative follow-up, which is included in the surgical payment; Management of the expected postoperative course; Complications related to the surgery, which have their own modifiers Full guide: https://vizora.co/modifiers/24 ### Modifier 57 — Decision for surgery Category: Global period Modifier 57 reports an evaluation and management service that resulted in the initial decision to perform major surgery. Without it, an E/M on the day of or the day before a major procedure is treated as part of the surgical package. Use it when: An E/M on the day of or day before a major procedure at which the decision to operate was made; Where the surgery carries a 90-day global period Do not use it when: Minor procedures with a 10-day or zero-day global period — modifier 25 applies there; A visit confirming a decision made at an earlier encounter; Routine preoperative clearance or history taking after the decision was already made Full guide: https://vizora.co/modifiers/57 ### Modifier 78 — Unplanned return to the operating or procedure room by the same physician for a related procedure during the postoperative period Category: Global period Modifier 78 reports an unplanned return to the operating room during a global period to treat a complication of the original surgery. The return is paid at the intraoperative rate only, and it does not restart the global period. Use it when: A complication of the original surgery requiring a return to the operating or procedure room; An unplanned reoperation by the same physician during the global period Do not use it when: A staged or planned second procedure, which has its own modifier; An unrelated procedure during the global period, which takes modifier 79; Treatment of a complication that did not require a return to the operating room Full guide: https://vizora.co/modifiers/78 ### Modifier 79 — Unrelated procedure or service by the same physician during the postoperative period Category: Global period Modifier 79 reports a procedure during a surgical global period that is unrelated to the original surgery. Unlike a related return, it is paid at the full rate and starts its own global period. Use it when: A procedure during a global period addressing a completely different problem; Surgery on a different anatomic site during another procedure's global window; The same procedure performed on the contralateral side Do not use it when: A complication of the original surgery, which takes modifier 78; A staged or planned procedure related to the original; An evaluation and management service, which takes modifier 24 Full guide: https://vizora.co/modifiers/79 ### Modifier 76 — Repeat procedure or service by the same physician Category: Repeat Modifier 76 reports a procedure repeated by the same physician on the same day, distinguishing a genuine repeat from a duplicate claim. Without it, the second claim adjudicates as a duplicate and denies. Use it when: The same procedure performed again the same day by the same physician; A repeat radiograph to assess change or confirm placement; A repeat procedure necessitated by a change in the patient's condition Do not use it when: The repeat was performed by a different physician, which takes modifier 77; A repeat clinical diagnostic laboratory test, which takes modifier 91; Resubmitting a claim that was not paid, which needs a corrected claim not a modifier Full guide: https://vizora.co/modifiers/76 ### Modifier 91 — Repeat clinical diagnostic laboratory test Category: Repeat Modifier 91 reports a clinical diagnostic laboratory test repeated on the same day to obtain successive results. It applies only where repeat testing was clinically necessary, not where a test was rerun for quality control or because of equipment failure. Use it when: Serial testing to monitor a changing value over the course of a day; Repeat testing required to assess response to treatment; Successive specimens genuinely needed for clinical decision-making Do not use it when: Rerunning a test to confirm an initial result; Repeat testing due to specimen problems or equipment failure; Tests that are defined as serial by their own code descriptor; Repeat procedures that are not laboratory tests, which take modifier 76 or 77 Full guide: https://vizora.co/modifiers/91 ### Modifier GA — Waiver of liability statement issued as required by payer policy Category: Coverage attestation Modifier GA attests that a valid Advance Beneficiary Notice is on file for a service expected to be denied as not medically necessary. It is what makes the balance billable to the patient once the denial arrives. Use it when: A Medicare service expected to be denied as not reasonable and necessary; Where a valid ABN was signed by the beneficiary before the service; Where the practice intends to bill the patient after the denial Do not use it when: No ABN was obtained, or it was obtained after the service; A blanket ABN signed routinely at registration, which is not valid; Services excluded by statute rather than denied for medical necessity Full guide: https://vizora.co/modifiers/ga ### Modifier KX — Requirements specified in the medical policy have been met Category: Coverage attestation Modifier KX attests that the coverage criteria in the applicable medical policy are met and that supporting documentation is on file. It is a statement about the file, not a character that makes claims pay. Use it when: Durable medical equipment where the policy's coverage criteria are documented; Therapy services exceeding a threshold where continued care is justified and documented; Any item or service whose policy specifies KX as the attestation of met criteria Do not use it when: The documentation has not been obtained or verified; The criteria are partly met and the gap has not been resolved; Routinely, as a default appended to every claim in a category Full guide: https://vizora.co/modifiers/kx ### Modifier XS — Separate structure — a service that is distinct because it was performed on a separate organ or structure Category: Evaluation and management Modifier XS is the most-used of the four X modifiers. It states that two services were distinct because they were performed on separate organs or anatomic structures, replacing the generic distinct-service modifier with a specific reason payers can evaluate. Use it when: Two procedures performed on different organs during the same session; Procedures on separate anatomic structures that an edit would otherwise bundle; Lesions, joints or sites that are genuinely distinct from one another Do not use it when: Two techniques applied to the same lesion or structure; The distinction is a separate encounter rather than a separate site — use XE; The services were performed by different practitioners — use XP; No genuine anatomic separation exists and the edit is simply inconvenient Full guide: https://vizora.co/modifiers/xs ### Modifier XE — Separate encounter — a service that is distinct because it occurred during a separate encounter Category: Evaluation and management Modifier XE states that two services were distinct because they took place at separate encounters on the same day. It is the cleanest of the X modifiers to support, because the separation is a matter of documented time rather than clinical judgement. Use it when: A patient returns later the same day for a genuinely separate encounter; A morning procedure and an unrelated afternoon procedure; Services separated by the patient leaving and returning Do not use it when: Services performed in one continuous session, however long; A break within a single encounter — a pause is not a separate encounter; The distinction is anatomic rather than temporal — use XS Full guide: https://vizora.co/modifiers/xe ### Modifier XP — Separate practitioner — a service that is distinct because it was performed by a different practitioner Category: Evaluation and management Modifier XP states that two services were distinct because different practitioners performed them. It resolves edits that assume one clinician performed both halves of a bundled pair when in fact two were involved. Use it when: Two practitioners each performed a distinct service on the same patient the same day; A service performed by a covering physician while another performed the related procedure; Group practice situations where an edit assumes a single performing clinician Do not use it when: One practitioner performed both services; The distinction is anatomic or temporal rather than by clinician; Different practitioners within a group billing under the same identifier, where the payer treats them as one Full guide: https://vizora.co/modifiers/xp ### Modifier XU — Unusual non-overlapping service — a service that is distinct because it does not overlap the usual components of the main service Category: Evaluation and management Modifier XU covers distinct services that do not fit the separate-site, separate-encounter or separate-practitioner categories. It states that the service did not overlap the usual components of the main procedure, and it is the hardest of the four to support. Use it when: A service genuinely distinct for a reason none of the other X modifiers describes; Work that falls outside the usual components of the primary procedure; Only where the reason for distinction can be stated plainly in the record Do not use it when: A separate site, encounter or practitioner better describes it — use XS, XE or XP; As a substitute for modifier 59 when no specific reason exists; Where the service is simply an inconvenient bundle to clear Full guide: https://vizora.co/modifiers/xu ### Modifier 77 — Repeat procedure or service by another physician Category: Repeat Modifier 77 reports a procedure repeated on the same day by a different physician than the one who performed it originally. Without it, the second claim adjudicates as a duplicate even though a different clinician performed the work. Use it when: The same procedure repeated the same day by a different physician; A second reading or study performed by another clinician after a change in condition; Cross-coverage situations where a covering physician repeats a service Do not use it when: The repeat was by the same physician, which takes modifier 76; A repeat clinical diagnostic laboratory test, which takes modifier 91; Two distinct services rather than a repeat of the same one Full guide: https://vizora.co/modifiers/77 ### Modifier 95 — Synchronous telemedicine service rendered via a real-time interactive audio and video telecommunications system Category: Evaluation and management Modifier 95 identifies a service delivered by real-time interactive audio and video rather than in person. It requires both audio and video — an audio-only encounter does not qualify and has its own separate coding path. Use it when: A service delivered by simultaneous two-way audio and video; Codes the payer recognises as eligible for telehealth delivery; Where the payer's convention is modifier 95 rather than a place-of-service change Do not use it when: Audio-only encounters, which have their own codes and modifiers; Asynchronous store-and-forward services; Services the payer does not recognise as telehealth-eligible; Where the payer requires a place-of-service code instead of a modifier Full guide: https://vizora.co/modifiers/95 ### Modifier 22 — Increased procedural services Category: Multiple and bilateral Modifier 22 reports a procedure that required substantially greater work than typical. It is one of the few modifiers that requests additional payment rather than describing a circumstance, which means it requires supporting documentation and a written explanation. Use it when: Work substantially exceeding what the procedure ordinarily requires; Documented additional time, technical difficulty or intensity; Where a written statement can quantify how much greater the effort was Do not use it when: A procedure that was merely somewhat harder than average; Additional time with no documented reason for it; Routine complexity already contemplated by the code; As a general uplift on difficult cases without specific justification Full guide: https://vizora.co/modifiers/22 ### Modifier 52 — Reduced services Category: Multiple and bilateral Modifier 52 reports a service that was partially reduced or eliminated at the physician's discretion, without being discontinued. The procedure was completed as intended, but less of it was performed than the code describes. Use it when: A procedure deliberately performed to a lesser extent than the code describes; A bilateral-by-definition code where only one side was treated; A service where a component was intentionally not performed Do not use it when: A procedure started and then discontinued, which takes modifier 53; A procedure fully performed as described by the code; Where a different, more specific code describes the lesser service Full guide: https://vizora.co/modifiers/52 ### Modifier 53 — Discontinued procedure Category: Multiple and bilateral Modifier 53 reports a procedure started and then terminated, generally because continuing posed a risk to the patient. It applies after the procedure has begun — a case cancelled before it starts is not a discontinued procedure. Use it when: A procedure begun and then stopped because of risk to the patient; Termination after anaesthesia induction or after the procedure commenced; Where the physician made the decision to stop for the patient's wellbeing Do not use it when: A case cancelled before the procedure began; A procedure completed at reduced scope by choice, which takes modifier 52; Elective cancellation for scheduling or non-clinical reasons Full guide: https://vizora.co/modifiers/53 ### Modifier 58 — Staged or related procedure or service by the same physician during the postoperative period Category: Global period Modifier 58 reports a planned or staged procedure during a global period, or a more extensive procedure following an initial one. Unlike an unplanned return, it is paid at the full rate and starts a new global period. Use it when: A procedure planned at the time of the original surgery as a second stage; A more extensive procedure following an initial, less extensive one; Therapy following a diagnostic procedure during the global period Do not use it when: An unplanned return to theatre for a complication, which takes modifier 78; A procedure unrelated to the original surgery, which takes modifier 79; Routine postoperative care included in the surgical package Full guide: https://vizora.co/modifiers/58 --- ## Frequently asked questions ### What is medical billing? Medical billing is the process of translating delivered care into coded claims, submitting them to insurance payers, and pursuing payment until the balance is resolved. It covers coding, claim scrubbing, submission, payer follow-up, payment posting, denial appeals and patient balance collection. ### What is the difference between medical billing and revenue cycle management? Medical billing is one stage of the revenue cycle — preparing and submitting claims. Revenue cycle management covers the entire span from patient scheduling and eligibility verification through coding, submission, denial prevention, AR follow-up and analytics. Most revenue leakage happens at the front end, which billing alone never touches. ### How can Vizora help my practice? We take over the full billing operation — coding, submission, payer follow-up, denial appeals, AR recovery and reporting. Practices typically come to us with a denial rate above 10%, AR days above 45, or a billing staffing problem they cannot solve by hiring. ### What specialties do you work with? We support 25 specialties, from primary care and behavioral health through cardiology, orthopedics, oncology and surgical subspecialties. Coders are assigned by specialty rather than pooled, so the person coding your claims works in your specialty every day. ### How much do medical billing services cost? Vizora charges a percentage of net collections, starting at 3% and typically ranging from 3% to 6% depending on practice size, specialty and claim volume. You pay only when we collect. There are no setup fees and no hidden charges. For comparison, one in-house biller costs roughly $73,000 a year fully loaded before software or management overhead. ### Is outsourcing cheaper than billing in-house? For most small and mid-sized practices, yes — but the comparison has to be complete. In-house costs include salary, benefits at roughly 30% of total compensation, billing software, clearinghouse fees, training, and the coverage gap when your biller takes leave. A percentage-of-collections model also scales with volume rather than requiring a hire. ### Is there a long-term contract? We recommend a minimum six-month partnership because revenue cycle improvements compound over that horizon rather than appearing immediately. Terms beyond that are flexible, and we would rather earn renewal than enforce a lock-in. ### Do you charge extra for denial appeals? No. Denial management and appeals are part of standard service. Charging separately for appeals would create an incentive to generate denials, which is precisely the wrong alignment. ### How long does onboarding take? Typically within 2 weeks depending on practice size and complexity, covering credentialing verification, system integration, historical data migration and staff training. We sequence onboarding so your existing claim flow is never interrupted. ### What information do you need from my practice? Provider credentials, tax ID and NPI numbers, current payer contracts, practice management system access, historical billing data and your fee schedules. We provide a checklist and work through it with you rather than handing it over. ### Do we have to change our practice management system or EHR? No. We work inside your existing systems. If your current software is genuinely limiting collections we will tell you and quantify it, but migration is never a precondition of working with us. ### Will we still have visibility into our billing? Yes. You get portal access with real-time claim status, payment posting, denial trends and financial performance, plus monthly reporting and review. Outsourcing the work should not mean losing sight of it. ### What is a normal claim denial rate? For physician practices, MGMA reports an aggregate first-submission denial rate of 8%. Hospitals and health systems run higher — Kodiak Solutions measured 11.81% in 2024. Experian Health found 41% of providers now report denial rates above 10%, up from 30% in 2022. If you are above 10%, there is recoverable revenue in your denials. ### How much does it cost to rework a denied claim? Premier Inc. put the average cost of contesting a denied claim at $57.23 in 2023, a 31% increase in a single year. Across US providers that amounts to $25.7 billion spent annually adjudicating claims with payers, of which roughly $18 billion is potentially unnecessary. ### Are denied claims usually recoverable? Frequently. Premier Inc. found approximately 70% of denied claims are ultimately overturned and paid when appealed, and Optum reports 84% of denials are potentially avoidable in the first place. The revenue is generally collectible — the problem is that appeals take time most practices do not have. ### How can we reduce claim denials? Start at the front end. Optum found 44% of denials originate in front-end processes, with registration and eligibility errors alone accounting for 24.3% — the largest single category. Verifying eligibility before the visit, confirming authorization requirements, and scrubbing claims pre-submission prevent more denials than any back-end process. ### What is the typical billing cycle time? Our average is 20 days from date of service to posted payment. For context, MGMA puts the median practice at 47 days in accounts receivable, with better performers at 36. ### Is Vizora HIPAA compliant? Yes. We operate under HIPAA safeguards including encrypted data transmission and storage, role-based access controls, staff training and access logging. A Business Associate Agreement is available on request and should be executed before any protected health information is exchanged. ### How do you protect patient data? 256-bit encryption in transit and at rest, multi-factor authentication, role-based access restricted to the minimum necessary information, access logging, background checks on all staff, and regular security review. ### What certifications do your coders hold? Our coders are certified and are assigned by specialty rather than pooled across a general queue. Coding accuracy is audited internally on a sample basis rather than assumed. ### Will you sign a Business Associate Agreement? Yes, and you should require one. Any vendor handling protected health information on your behalf is a business associate under HIPAA, and the agreement is what establishes their obligations. We provide ours during onboarding as a matter of course. --- ## Primary sources referenced by this site - Medicare Claims Processing Manual (Centers for Medicare & Medicaid Services): https://www.cms.gov/regulations-and-guidance/guidance/manuals/internet-only-manuals-ioms - CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F) (Centers for Medicare & Medicaid Services): https://www.cms.gov/priorities/key-initiatives/burden-reduction/interoperability/policies-and-regulations - No Surprises Act guidance (Centers for Medicare & Medicaid Services): https://www.cms.gov/nosurprises - Medicare Physician Fee Schedule lookup (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/physician-fee-schedule/search - Claim Adjustment Reason Codes (CARC) (X12): https://x12.org/codes/claim-adjustment-reason-codes - Remittance Advice Remark Codes (RARC) (X12): https://x12.org/codes/remittance-advice-remark-codes - CPT code set (American Medical Association): https://www.ama-assn.org/practice-management/cpt - ICD-10-CM official guidelines and files (CDC / National Center for Health Statistics): https://www.cdc.gov/nchs/icd/icd-10-cm/index.html - HCPCS Level II code set (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coding-billing/healthcare-common-procedure-system - National Correct Coding Initiative (NCCI) edits (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits - CMS-1500 claim form standards (National Uniform Claim Committee): https://www.nucc.org - Revenue Cycle Denials Index (Optum): https://business.optum.com/en/insights/denials-index.html - MGMA DataDive and MGMA Stat (Medical Group Management Association): https://www.mgma.com/datadive - MAP Keys revenue cycle metrics (Healthcare Financial Management Association): https://www.hfma.org - CAQH Index: cost of administrative transactions (CAQH): https://www.caqh.org/insights/caqh-index-report - Claims denials and appeals research (KFF): https://www.kff.org/private-insurance/ - NPI Registry (NPPES) (Centers for Medicare & Medicaid Services): https://npiregistry.cms.hhs.gov - PECOS Medicare enrollment (Centers for Medicare & Medicaid Services): https://pecos.cms.hhs.gov - CAQH ProView (CAQH): https://proview.caqh.org - AAPC certification and coding resources (AAPC): https://www.aapc.com - AHIMA professional standards (American Health Information Management Association): https://www.ahima.org - Find your Medicare Administrative Contractor (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coding-billing/medicare-administrative-contractors-macs/who-are-macs - Medicare Coverage Database (LCD/NCD) (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare-coverage-database/search.aspx - State Medicaid program overviews (Medicaid.gov): https://www.medicaid.gov/state-overviews - HIPAA for professionals (HHS Office for Civil Rights): https://www.hhs.gov/hipaa/for-professionals/index.html - Sample Business Associate Agreement provisions (HHS Office for Civil Rights): https://www.hhs.gov/hipaa/for-professionals/covered-entities/sample-business-associate-agreement-provisions/index.html - OIG compliance program guidance (HHS Office of Inspector General): https://oig.hhs.gov/compliance/compliance-guidance/ - HIPAA breach portal (HHS Office for Civil Rights): https://ocrportal.hhs.gov/ocr/breach/breach_report.jsf - NCCI Policy Manual for Medicare Services (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits/medicare-ncci-policy-manual - Medically Unlikely Edits (MUE) tables (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coding-billing/national-correct-coding-initiative-ncci-edits/medicare-ncci-medically-unlikely-edits - Global Surgery booklet (Centers for Medicare & Medicaid Services): https://www.cms.gov/files/document/mln907166-global-surgery-booklet.pdf - Medicare claims appeals process (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/appeals-grievances/fee-for-service - Advance Beneficiary Notice of Noncoverage (ABN) (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/forms-notices/beneficiary-notices-initiative/ffs-abn - OIG Work Plan (HHS Office of Inspector General): https://oig.hhs.gov/reports/work-plan/ - Medicare Benefit Policy Manual (Centers for Medicare & Medicaid Services): https://www.cms.gov/regulations-and-guidance/guidance/manuals/internet-only-manuals-ioms-items/cms012673 - Place of Service code set (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coding-billing/place-of-service-codes/code-sets - Medicare Secondary Payer Manual (Centers for Medicare & Medicaid Services): https://www.cms.gov/regulations-and-guidance/guidance/manuals/downloads/msp105c01.pdf - Medicare telehealth billing (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/coverage/telehealth - CLIA certification and permitted testing (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/quality/clinical-laboratory-improvement-amendments - DMEPOS supplier standards and enrollment (Centers for Medicare & Medicaid Services): https://www.cms.gov/medicare/enrollment-renewal/providers-suppliers/durable-medical-equipment-prosthetics-orthotics-supplies-dmepos - Workers' compensation medical billing (US Department of Labor, OWCP): https://www.dol.gov/agencies/owcp/regs/feeschedule/fee - Evaluation and Management services guide (Centers for Medicare & Medicaid Services): https://www.cms.gov/outreach-and-education/medicare-learning-network-mln/mlnproducts/downloads/eval-mgmt-serv-guide-icn006764.pdf - Medicare timely filing requirements (Centers for Medicare & Medicaid Services): https://www.cms.gov/regulations-and-guidance/guidance/transmittals/downloads/r735otn.pdf