Specialty billing
Mental & Behavioral Health Medical Billing Services
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.
Mental & Behavioral Health benchmarks
- Typical denial rate
- 10–16%
- Days in AR
- 32–45
- Achievable clean claim rate
- 97%+
Typical ranges for behavioral health practices. Your actual numbers are measured during the audit.
The complexity
Why mental & behavioral health is uniquely difficult to bill
Psychotherapy codes are selected by documented face-to-face time within defined ranges
Credentialing delays prevent new clinicians from billing for months after hire
Many plans carve behavioral health out to a separate managed behavioral health organization
Session limits and concurrent authorization requirements vary widely by plan
Add-on codes for psychotherapy alongside E/M require both services be documented separately
Telehealth place-of-service and modifier conventions continue to shift by payer
Coding
Mental & Behavioral Health procedure codes we work with daily
A representative sample, not an exhaustive list. Coders are assigned by specialty rather than pooled.
| Code | Description |
|---|---|
| 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 |
Revenue leakage
Where mental & behavioral health practices lose money
These are the denial patterns specific to this specialty — the ones a general-purpose billing service will not be looking for.
Time documentation gaps
90837 downcoded to 90834 because the note does not document start and stop times establishing the 53-minute threshold.
Provider not credentialed
Claims denied outright because the rendering clinician was not yet enrolled with the payer on the date of service.
Carve-out misrouting
Claims sent to the medical plan when behavioral health is administered by a separate managed behavioral health organization.
Authorization or session limits
Sessions beyond the authorized count denied where continued-care authorization was not obtained in time.
Add-on code sequencing
Psychotherapy add-on codes billed without a payable E/M primary, or with insufficient separate documentation of each service.
Payer landscape
What behavioral health practices need to know about payers
Payer policy drives more mental & behavioral health denials than coding does. Knowing the policy before the service is what prevents them.
- Behavioral health is frequently carved out to a separate administrator — verify the correct payer ID before submission, not after denial.
- Several payers scrutinize 90837 utilization patterns and will request records where its share of sessions is unusually high.
- Medicaid managed care plans commonly impose the tightest session limits and the most frequent re-authorization requirements.
Proof
A mental & behavioral health practice we worked with
Wellness Behavioral Health streamlines multi-provider billing
Managing billing across eight therapists with different insurance panels had become administratively unmanageable. Credentialing delays were preventing newly hired providers from billing for six months or more, so delivered care went uncollected.
We centralized billing across all providers, implemented a fast-track credentialing process that began before each start date, and established payer-specific protocols for behavioral health carve-outs.
Results
- All providers credentialed within 90 days of hire
- Billing errors reduced 64%
- Practice revenue increased 38%
- Administrative time reduced by 15 hours per week
Dr. Emily Rodriguez, Clinical Director · Denver, CO
Questions
Mental & Behavioral Health billing FAQ
Last updated August 20, 2026
Reviewed by a certified coding leadBoth are individual psychotherapy; the distinction is documented time. 90834 covers 38–52 minutes and 90837 covers 53 minutes or more. Because the reimbursement difference is meaningful and the threshold is precise, documenting actual start and stop times — rather than a scheduled session length — is what makes 90837 defensible.
Because revenue is per-session and recurring. A therapist who cannot bill for three months represents three months of delivered care that may never be collectible, since many payers do not permit retroactive billing to the application date. In a group practice hiring several clinicians a year, this is often the single largest source of lost revenue.
Many health plans contract behavioral health administration to a separate managed behavioral health organization with its own payer ID, network, authorization rules and fee schedule. Submitting to the medical plan when a carve-out applies produces an immediate denial, and it is one of the most common avoidable errors in this specialty.
Telehealth conventions vary by payer on place-of-service codes and modifiers 95 and GT, and they have changed repeatedly. We maintain payer-specific rules rather than applying one convention across the board, since the wrong combination denies cleanly and silently.
Primary sources
Coverage, rates and local policy for mental & behavioral health, at the source.
- Medicare Benefit Policy Manual (opens in a new tab)
Centers for Medicare & Medicaid Services — What Medicare covers and under what conditions, as distinct from how a claim is processed. The starting point for any coverage or medical necessity question.
- 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.
- Medicare telehealth billing (opens in a new tab)
Centers for Medicare & Medicaid Services — Current telehealth code list, place of service and modifier conventions. This area has changed repeatedly, so the date on any secondary guidance matters.
Reading
Mental & Behavioral Health billing, in depth
Specialty Billing
Why behavioral health claims deny, and what fixes them
Time-based session codes, carved-out payers and visit limits make behavioral health the specialty where correct clinical work most often bills incorrectly.
Credentialing
Credentialing mistakes that delay payments
A provider who cannot bill still costs you a salary. The five credentialing errors that create the longest revenue gaps.
Get a free mental & behavioral health billing audit
We'll review your mental & behavioral health 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