Coding · July 11, 2026 · 6 min read

CPT Code 90837: The 60-Minute Psychotherapy Code, Explained

CPT 90837 is the highest-reimbursing standard individual psychotherapy code — and the most audited. Payers know the difference between a 50-minute and a 55-minute session is worth 20–30% more per claim, so 90837 gets attention that 90834 doesn't. Billed correctly with solid documentation, it's fully defensible. Here's how.

What CPT 90837 covers

90837 is individual psychotherapy with the patient (and/or a family member) when documented face-to-face time is 53 minutes or more. There's no upper limit — a 75-minute session is still one unit of 90837 (extended sessions beyond that may warrant prolonged-service coding with some payers, which is its own rabbit hole and payer-specific). All licensed psychotherapy providers can bill it.

The 53-minute line

A "therapy hour" that runs 50 minutes is a 90834. The distinction is documented minutes, not the appointment slot.

Why payers scrutinize 90837

A clinician who bills 90837 for every session, every patient, at exactly the same duration is a pattern payers flag. Several large commercial payers have historically sent "education" letters or requested records from high-90837 billers, and some have required prepayment review. None of that makes 90837 improper — longer sessions are clinically appropriate for trauma work, EMDR, exposure therapy, complex presentations, and crisis-adjacent care. It means the documentation has to carry the code.

Documentation that survives an audit

• Exact time, every session. Start/stop times beat "60 minutes" typed by habit.
• Why the longer session was needed. One sentence of medical necessity — symptom acuity, modality requirements (e.g., EMDR protocol), or clinical events in session.
• Variation where it's real. If some sessions are genuinely 45 minutes, code them as 90834 — a mixed pattern reflects honest coding.

Reimbursement notes

90837 typically pays 20–30% more than 90834, varying by payer, region, and credential. Across a full caseload that difference is thousands of dollars per clinician per year — which is exactly why practices shouldn't default to 90834 out of audit anxiety when their sessions genuinely run 53+ documented minutes. The full comparison: 90837 vs 90834.

Common denials and how to avoid them

• Records requests that stall payment — answer them fast with time-stamped notes; slow responses become denials.
• Downcoding on review — payer reviews the note, finds no documented time, and pays at 90834 rates.
• Telehealth modifier errors — 90837 is telehealth-eligible with the correct modifier and place of service.
• Plan-specific limits — a few plans cap 90837 frequency or require auth where 90834 needs none. Verify at intake.

See the whole code family in the behavioral health CPT reference, and how AI denial management catches downcoding patterns automatically.

This guide is for general reference only. CPT codes, HCPCS codes, and payer rules change, always verify against current coding guidance and your specific payer policies. CPT is a registered trademark of the American Medical Association.