Mental Health Billing 2026: 90837 vs 90834 Explained

If you’ve ever stared at a claim and wondered whether to bill 90837 or 90834, you’re not alone. These two codes cover the same service, serve the same providers, and differ by a single time threshold. But that threshold determines your reimbursement, your audit risk, and your compliance posture.

This guide breaks down everything you need to know for 2026, from time requirements and documentation standards to the latest CMS updates and how to protect your practice if you’re ever reviewed.

Why this costs more than you think

Most billing mistakes aren’t dramatic. Nobody’s committing fraud. What happens is quieter: a practice defaults to 90837 for every session because it reimburses higher. A few hundred sessions a month. No one checks the audit risk. Then one day, a payer sends a letter.

The reimbursement gap between 90837 and 90834 adds up faster than most practices realize. Use the CMS Medicare Physician Fee Schedule Look-Up Tool to find the exact rates for your locality, then multiply that gap across your monthly session volume. The number will get your attention. The CMS Medicare Claims Processing Manual is explicit about repayment obligations when claims don’t match documentation.

The frustrating part is that most of these errors aren’t intentional. They happen because the distinction between the two codes isn’t always obvious in the middle of a busy clinical day, and documentation habits are inconsistent across the team.

Who uses these codes

CPT codes 90837 and 90834 apply across all licensed mental health providers, licensed clinical social workers (LCSWs), licensed professional counselors (LPCs), marriage and family therapists (MFTs), psychologists, and psychiatrists. If you provide individual outpatient psychotherapy and bill insurance, these two codes are almost certainly your highest-volume codes.

They are used in both in-person and telehealth settings, by solo practitioners and large group practices alike. The rules are the same regardless of your setting, what changes, is the documentation tools available to you, and the scrutiny level of your particular payer mix.

What each code actually means

Feature	90834	90837
Session Length	38 to 52 minutes	53+ minutes
Typical Use	Standard outpatient psychotherapy	Extended or high-complexity sessions
Reimbursement	Standard	Higher
Audit Scrutiny	Moderate	High
Documentation Burden	Standard SOAP documentation	Detailed medical necessity + precise timing
Telehealth Eligible	Yes	Yes

90837

The 60-minute code

OmniMD’s medical billing software includes mental health-specific billing rules that flag CPT code mismatches, missing place-of-service codes, and modifier errors before claims are submitted, covering the full range of psychotherapy and psychiatric evaluation codes.

Code 90837 covers individual psychotherapy sessions of 53 minutes or more. It is appropriate when the clinical complexity or patient acuity genuinely demands extended time, think trauma-focused therapy, patients in active crisis, first episodes of psychosis, or complex co-occurring disorders requiring deep therapeutic work in a single session.

The word that matters in that sentence is “genuinely.” A session that drifted long because the conversation went sideways is not a 90837. A session that required 60 minutes of evidence-based intervention to address acute clinical need is. Your documentation has to carry that distinction.

It is also worth noting that 90837 carries a higher documentation burden than 90834. Not dramatically higher, but meaningfully so. You must record start and end times, articulate why the extended session was medically necessary, and describe the clinical complexity that warranted it. If your note doesn’t support the code, the code won’t survive a review.

90834

The 45-minute code

Code 90834 covers sessions between 38 and 52 minutes. This is the practical reality for most outpatient therapy, a standard appointment slot, a stable patient working on ongoing treatment goals, a clean SOAP note. It is not a lesser code. It is the correct code for the majority of outpatient sessions.

Defaulting to 90837 across the board is both clinically inaccurate and, at scale, one of the clearest audit signals that exists in behavioral health billing. A practice whose claims show 90% of sessions billed as 90837 will look very different to a payer than one showing a realistic 30 to 40% split. That difference in how your practice looks on paper has real consequences.

What about 90832?

It’s worth briefly mentioning CPT 90832, which covers sessions between 16 and 37 minutes. This code reimburses around $75 to $100 under Medicare 2026 and is appropriate for brief structured check-ins, medication management add-ons, or short-format therapy models. It is less common in traditional outpatient settings but important to know, especially if your practice includes any brief intervention formats or collaborative care models.

Documentation: what your notes must include

Documentation is not just a compliance requirement. It is the evidence that your code selection was clinically sound. In an audit, your notes are all you have. Here is exactly what each code requires.

For 90837, your note must show:

1. Session start time and end time, explicitly recorded, not implied
2. Medical necessity language explaining why the extended session was clinically required
3. Nature of complexity, active crisis, trauma processing, diagnostic complexity, acute symptom exacerbation
4. Therapeutic interventions used and the patient’s documented response
5. Progress toward treatment goals and a clear forward plan

The most common documentation failure for 90837 is vague medical necessity language. Phrases like “patient required extended support” do not pass scrutiny.

What does pass:

“Patient presented in acute distress following a trauma disclosure. Session extended to 65 minutes to complete trauma processing and stabilization prior to discharge. Evidence-based intervention: prolonged exposure protocol, phase two.”

For 90834, your standard SOAP note needs:

1. Session start and end time (build this habit for every code, not just 90837)
2. Subjective: patient-reported mood, symptoms, and functioning since last visit
3. Objective: clinical observations and relevant mental status elements
4. Assessment: current level of functioning and progress toward treatment goals
5. Plan: interventions used, any homework or between-session tasks, next appointment

One habit worth building regardless of which code you’re billing:

Always record start and end time. It takes five seconds, it costs nothing, and in an audit it is the single most important piece of documentation you have. Billing software that auto-captures session timestamps, such as OmniMD, removes the reliance on clinician memory and closes one of the most common documentation gaps before it becomes a problem.

What changed in 2026

CMS 2026 fee schedule — RVU adjustments

The 2026 Physician Fee Schedule includes modest upward adjustments to work RVUs for 90837. This lifts the Medicare national rate slightly above 2025 levels. Commercial payers often benchmark their reimbursement rates against CMS figures, so even if most of your patients are commercially insured, the fee schedule update is relevant. Review your contracted rates against the new benchmarks before the end of Q2, you may have room to renegotiate.

Telehealth parity extended through December 2026

Both 90837 and 90834 remain fully reimbursable via telehealth under the ongoing extension of pandemic-era flexibilities. This is significant, telehealth parity has been extended year by year since 2020, and its continuation through 2026 means hybrid and fully remote practices can continue billing these codes without reimbursement penalty.

Real-time audio-video sessions require modifier 95 and place of service code 02. Audio-only sessions have separate modifier requirements, confirm specifics with your Medicare Administrative Contractor, as state Medicaid programs vary and commercial payers have their own telehealth policies.

Upcoding scrutiny is increasing

This is the update that matters most for most practices. Practices billing more than 70% of sessions as 90837 are increasingly flagged for pre-payment review and retrospective audits by both CMS and commercial payers. The pattern looks suspicious not because long sessions are wrong, but because a stable outpatient caseload consisting almost entirely of 60-minute clinical encounters is, statistically, implausible.

CMS and most major commercial payers have specialty-level benchmarks for code distribution. They know what a typical outpatient mental health practice looks like. If yours looks dramatically different, expect scrutiny.

Audit signal: If your 90837 rate exceeds 65 to 70% of your psychotherapy claims, you are statistically outside the norm. Documentation is your only protection once a review starts, the question is whether yours will hold up.

Which code do you use?

The decision comes down to two things:

• how long the session ran
• whether your documentation supports the clinical reason it ran that long.

If both boxes are checked, the code choice is straightforward.

Use 90837 when your session hit 53 minutes or more and the clinical complexity genuinely warranted it, active crisis, trauma processing, a new complex presentation, or acute symptom exacerbation.

Use 90834 when your session ran between 38 and 52 minutes with a stable patient working toward ongoing treatment goals. This is your baseline code for most outpatient sessions.

For telehealth, the same time rules apply, add modifier 95 and place of service 02 regardless of which code you’re billing.

When in doubt, bill what your documentation actually supports, not what reimburses higher.

How OmniMD simplifies mental health billing

Behavioral health is one of the most audit-sensitive specialties in outpatient care. The documentation requirements are specific, the code selection is nuanced, and the consequences of getting it wrong compound over time. OmniMD billing solutions were designed to reduce that risk while improving reimbursement accuracy.

When a provider documents a session, OmniMD can help align billing workflows with recorded session duration, reducing the likelihood of miscoding. Claims are reviewed against payer-specific billing requirements to identify modifier issues, missing fields, and common denial triggers before submission.

For practices concerned about audit readiness, structured behavioral health documentation workflows help ensure required elements, including session time and treatment details, are consistently captured.

OmniMD billing support includes:

• Automated CPT guidance based on documented session duration
• Pre-submission claim scrubbing for modifier and documentation errors
• Real-time eligibility verification workflows
• Audit-ready behavioral health documentation templates
• Behavioral health revenue cycle management support

The bottom line

90837 and 90834 are not interchangeable. They reflect different levels of clinical intensity, different documentation standards, and different levels of payer scrutiny. Using the right one, every time, isn’t just about compliance, it’s about building a billing practice that holds up over the long term.

In 2026, with telehealth parity extended and CMS audit activity increasing, the practices that invest in clean, well-documented billing now are the ones that won’t spend 2027 responding to recoupment demands.

Frequently Asked Questions

Q: Can I bill 90837 for telehealth in 2026?

Yes. Telehealth parity is extended through December 2026. Use modifier 95 and place of service 02 for audio-video sessions. Audio-only sessions may require modifier 93 depending on payer policy.

Q: What actually happens during an upcoding audit?

A post-payment audit can result in recoupment of the difference between what was paid and what should have been paid, plus interest. In cases of repeated or systematic upcoding, additional penalties may apply. Your documentation is your primary defense.

Q: Can I bill psychotherapy alongside an evaluation and management code?

Yes. Psychiatrists and other prescribers may bill psychotherapy add-on codes alongside an E/M code when both services are separately performed and documented.

Q: How often should I audit my own billing?

At minimum, quarterly. Review your code distribution regularly and perform random documentation audits to ensure notes consistently support billed services.

Q: Do commercial payers follow the same time rules as Medicare?

Generally yes, most have adopted the same 53-minute cutoff for 90837. Where they diverge is on telehealth modifiers, audio-only policies, and documentation standards. Verify directly with your top payers before assuming parity.

Place-of-service and modifier errors are not unique to mental health billing. OB/GYN billing has equally complex modifier requirements that determine reimbursement for E/M services billed alongside procedure codes. OB/GYN billing cheat sheet: global maternity and E/M coding covers the modifier and unbundling rules that apply when billing dual-specialty services.

Mental health prior authorization varies significantly by payer and session type, with some payers requiring concurrent review after a set number of sessions. Prior authorization automation: cutting approval time from 10 days to 2 hours covers the workflow that handles ongoing mental health authorization requirements without manual follow-up on every case.