Specialty billing
Cardiology Medical Billing Services
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.
Cardiology benchmarks
- Typical denial rate
- 12–18%
- Days in AR
- 38–52
- Achievable clean claim rate
- 96%+
Typical ranges for cardiology practices. Your actual numbers are measured during the audit.
The complexity
Why cardiology is uniquely difficult to bill
Diagnostics split into technical and professional components that must be billed to the correct entity
Interventional procedures carry global periods that bundle related follow-up care
Device monitoring codes bill on fixed 30- and 90-day calendar intervals, not per encounter
Catheterization codes bundle imaging and supervision that inexperienced coders unbundle
Stress testing splits across supervision, tracing and interpretation components
Prior authorization requirements on interventional procedures vary sharply by payer
Coding
Cardiology procedure codes we work with daily
A representative sample, not an exhaustive list. Coders are assigned by specialty rather than pooled.
| Code | Description |
|---|---|
| 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 |
Revenue leakage
Where cardiology practices lose money
These are the denial patterns specific to this specialty — the ones a general-purpose billing service will not be looking for.
Component billing errors
Echo and stress test billed globally when only the professional component was performed, or modifier 26 and TC applied to the wrong entity.
Global period bundling
Evaluation and management services billed inside an interventional global period without modifier 24 or 25 to establish they were unrelated.
Missing prior authorization
Interventional and advanced imaging procedures denied post-service because authorization requirements differ by payer and plan.
Monitoring interval violations
Remote monitoring codes submitted before the required 30- or 90-day interval has fully elapsed.
Medical necessity on diagnostics
Echocardiography and stress testing denied where the diagnosis code does not support the payer's coverage policy.
Payer landscape
What cardiology practices need to know about payers
Payer policy drives more cardiology denials than coding does. Knowing the policy before the service is what prevents them.
- Medicare Advantage plans frequently impose prior authorization on interventional cardiology where traditional Medicare does not.
- Coverage determinations for advanced cardiac imaging vary by MAC jurisdiction, so the same study can be payable in one state and denied in another.
- Remote monitoring reimbursement depends on documented interpretation, not merely on data receipt.
Proof
A cardiology practice we worked with
Northwest Cardiology improves cash flow by 45%
Complex cardiology procedures were producing frequent coding errors and underpayments, particularly around the technical and professional component split. AR days averaged 62, with significant aging receivables creating persistent cash flow pressure.
We deployed cardiology-specialized coders, implemented pre-authorization verification on all interventional procedures, and began aggressive AR follow-up driven by systematic aging report review.
Results
- Clean claim rate reached 97% on cardiology procedures
- AR days reduced from 62 to 24
- Cash flow improved 45%
- $180,000 in aging AR recovered within the first six months
Sarah Chen, MBA, Practice Administrator · Seattle, WA
Questions
Cardiology billing FAQ
Last updated August 20, 2026
Reviewed by a certified coding leadThree structural reasons: diagnostics split into technical and professional components that must be attributed correctly, interventional procedures carry global periods that bundle follow-up care, and device monitoring bills on fixed calendar intervals rather than per encounter. Each is a separate failure mode, and general-purpose coders routinely miss all three.
The technical component (modifier TC) covers equipment, supplies and staff; the professional component (modifier 26) covers the physician's interpretation and report. When a study is performed at a facility but read by your physician, only the professional component is billable by your practice. Billing globally in that situation is one of the most common cardiology denials.
Yes. Both carry distinct challenges — interventional work turns on global periods and vessel-specific coding, while EP involves lengthy procedures with ablation and mapping codes that bundle in ways payers scrutinize closely.
Remote monitoring codes bill on fixed 30- or 90-day intervals depending on device type. We track the interval per patient per device so claims never submit early, which is the single most common cause of monitoring denials.
Primary sources
Coverage, rates and local policy for cardiology, at the source.
- Medicare Coverage Database (LCD/NCD) (opens in a new tab)
Centers for Medicare & Medicaid Services — Searchable national and local coverage determinations. The direct answer to whether a diagnosis supports medical necessity for a given procedure.
- NCCI Policy Manual for Medicare Services (opens in a new tab)
Centers for Medicare & Medicaid Services — The reasoning behind the edits, chapter by chapter. Where the edit files tell you two codes conflict, this explains why — which is what an appeal has to address.
- Medicare Physician Fee Schedule lookup (opens in a new tab)
Centers for Medicare & Medicaid Services — Official allowed amounts by CPT/HCPCS code and locality. The reference point most commercial contracts are written against as a percentage.
Get a free cardiology billing audit
We'll review your cardiology denial patterns, coding accuracy and AR aging against the benchmarks above. Takes about two minutes to request.
No setup fees · You pay when we collect · Pricing from 3% of net collections