A 50-minute therapy hour is the most common source of confusion in behavioral health billing. Is it a 90834 or a 90837? The rule is simple, but billing it the wrong way every week adds up, in lost revenue or in payer attention.
Key takeaways
- Individual psychotherapy codes are chosen by documented face-to-face time, not by the length of the appointment slot.
- A 50-minute session is a 90834. 90837 starts at 53 minutes.
- Record start and stop times (or total minutes) in every note, and keep add-on codes for what they are meant for.
The three individual psychotherapy codes
CPT describes individual psychotherapy by the time you spend with the patient, in person or by synchronous telehealth:
| Code | Time with the client | Typical session |
|---|---|---|
| 90832 | 16 to 37 minutes | Brief session or check-in |
| 90834 | 38 to 52 minutes | A standard 45-minute session |
| 90837 | 53 minutes or more | A full 60-minute session |
A session under 16 minutes does not support a psychotherapy code. The ranges don’t land on neat numbers because CPT counts a time unit once its midpoint has passed.
Time is the deciding factor, and it must be in the note
The code on the claim has to match the psychotherapy time in your documentation. Time spent scheduling, talking about fees or finishing notes after the client leaves does not count.
The easiest habit is to record the start and stop time, or the total minutes, in every progress note. If a payer ever reviews your claims, that line is your evidence.
A common trap
A 50-minute hour is billed as 90834, not 90837. Practices that schedule 50-minute sessions and bill 90837 by default are exactly the pattern payers look for.
Does 90837 pay more?
Usually, yes. The difference varies by payer and by state, and some payers review practices that bill 90837 for most of their sessions. That is no reason to avoid it. If your sessions run 53 minutes or longer and the notes show it, 90837 is correct. The point is that the code follows the clock, not the fee schedule.
Add-on and related codes
- 90785, interactive complexity, can be added when something specific makes communication difficult, such as a third party who interferes or play equipment used with a child. Document what happened.
- 90833, 90836 and 90838 are the psychotherapy add-ons used when a physician, NP or PA provides an E/M service and psychotherapy in the same visit.
- 90839 and 90840 are for crisis psychotherapy. They are not a way to bill a long session.
Telehealth sessions
The same psychotherapy codes apply when the session is delivered by video. What changes is the place of service and, for many payers, a modifier such as 95. Check each payer’s rules, or read our guide to telehealth billing for mental health.
Not sure your coding would hold up?
We check every session code against the documented time before a claim leaves your practice, and flag notes that don’t support the code.
A quick pre-submission checklist
- Does the note show start and stop time or total minutes?
- Does the time fall inside the range for the code on the claim?
- Is any add-on code supported by something specific in the note?
- Are the modifier and place of service right for this payer and this setting?
If you’d rather not police this yourself, our therapy billing services and mental health billing team do it on every claim.
This article is general information, not coding or legal advice. Confirm current requirements with the AMA’s CPT code set and each payer’s policy.
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