CPT 90834: 45-Minute Individual Psychotherapy
CPT 90834: 45-Minute Individual Psychotherapy, Explained
CPT 90834 covers an individual psychotherapy session running 38 to 52 minutes. It’s the most commonly billed individual therapy code across the industry, the standard-length session most practices build their schedule around.
What is CPT 90834?
90834 is the mid-length tier of the individual psychotherapy time codes, sitting between 90832 (16-37 minutes) and 90837 (53+ minutes). It covers face-to-face individual therapy where the actual session time falls between 38 and 52 minutes.
Because it matches the traditional “50-minute therapy hour” that most practices schedule around, it tends to be the default code for a standard session, which is exactly why time documentation still matters here, even when it feels like the obvious choice.
When to use it
Use 90834 when the documented face-to-face time with the patient falls within the 38-52 minute window. It applies across therapeutic approaches, it’s defined by time and format (individual, not group or family), not by technique.
A scheduled 45-minute appointment doesn’t automatically mean 90834 applies. If the actual session ran 35 minutes due to a late start or early end, the documented time determines the code, not the calendar block.
What your documentation needs to show
As with every time-based psychotherapy code, the note needs to state the actual session length, either as start and end times or total minutes, clearly enough that a reviewer doesn’t have to guess. “Therapy session, 45 minutes” without supporting detail is weaker documentation than a note showing the actual time range.
The note also still needs the clinical substance, what was addressed, the therapeutic interventions used, and how the session ties back to the treatment plan.
Common reasons this code gets denied
Time documentation gaps. The most frequent issue, a note that doesn’t clearly support the 38-52 minute range.
Frequency flags. Some payers cap how many 90834 sessions they’ll reimburse per patient per month without added justification, worth checking your specific payer contracts rather than assuming no limit applies.
Diagnosis mismatch. If the diagnosis on the claim doesn’t align with what’s documented as the focus of treatment in the note, that’s an easy denial to avoid by double-checking before submission.
Related codes
Frequently asked questions
What’s the exact time range for 90834? +
38 to 52 minutes of face-to-face individual therapy. Below that falls to 90832, above it moves to 90837.
Is 90834 the same as a “standard” therapy session? +
It’s commonly treated that way since it matches the traditional 50-minute therapy hour, but it still has to be billed based on actual documented time, not just because it’s the typical appointment length.
Why would a payer deny a 90834 claim that looks complete? +
Usually one of two things: the time isn’t clearly stated in the note, or the session frequency for that patient has exceeded what the payer allows without additional justification on file.
Seeing a pattern of 90834 denials?
We work specifically with behavioral health practices. A free audit looks at your actual claims and shows you exactly what’s behind your denial pattern, not a generic checklist.