Psychotherapy CPT codes are paid on time, and time is the first thing payers audit. Choosing the right code — and documenting it the right way — is the difference between a clean claim and a recoupment letter months later.
The three core codes
- 90832 — psychotherapy, 16 to 37 minutes. The short-session code.
- 90834 — psychotherapy, 38 to 52 minutes. The most commonly billed session.
- 90837 — psychotherapy, 53 minutes and up. The highest-value code, and the most audited.
How time is counted
The time range is the duration of the psychotherapy service itself — not the length of the appointment block. Time with the patient counts; documentation time generally does not. Payers expect the note to reflect the actual time: a note that says "60-minute session" with 90834 billed is a classic denial and audit trigger. Bill the code the documented time supports, not the code you wish you'd collected for.
The codes that get missed
- 90833 / 90836 / 90838 — psychotherapy add-ons for 30 minutes of psychotherapy delivered the same day as an evaluation and management (E/M) visit. This is the standard structure for medication management combined with therapy.
- 90846 and 90847 — family sessions without and with the patient present. 90847 often pays more than a standard session but is billed far less often than it should be.
- 90853 — group therapy, frequently under-billed by practices that run groups.
Audit-proofing your psychotherapy billing
- Record start and stop times in the note, not just a duration
- Match the code to the documented time every session — no rounding up
- When an E/M and psychotherapy happen the same day, bill the add-on codes rather than underbilling
- Track denial patterns by code — a spike in 90837 denials usually means a documentation gap, not a payer problem
Coding is where mental health billing is won or lost. It's the first thing we review when a practice comes on board.