When a prescribing provider delivers medication management and psychotherapy in the same visit, the psychotherapy add-on code only survives review if two separate notes prove two separate services actually happened.
The three add-on codes, by time
CPT 90833 covers approximately 30 minutes of individual psychotherapy add-on, and applies when the psychotherapy portion runs 16 to 37 minutes. Below 16 minutes, no add-on code is billable at all.
CPT 90836 covers approximately 45 minutes. At 38 minutes or more of psychotherapy, the correct add-on shifts here instead of 90833.
CPT 90838 covers approximately 60 minutes, for the longest combined visits, and follows the same threshold logic one tier up.
What has to be true before you bill the add-on
Modifier 25 goes on the E/M code, signaling that a significant, separately identifiable service was performed alongside it. Two distinct notes are required: an E/M note covering chief complaint, history, medication review, assessment and plan, and a separate psychotherapy note covering the treatment modality, the specific issues addressed, the interventions delivered, and the patient's response. The psychotherapy note also needs its own start and stop times, tracked independently from the E/M portion of the visit.
Where practices lose the add-on on appeal
The most common failure point isn't the code selection, it's the paper trail. A visit that genuinely included 40 minutes of therapy but only has one merged note, with no separate start/stop times, reads to a reviewer as a single E/M visit with an add-on tacked on after the fact, not two services delivered.
What to check before your next batch of combined visit claims
1. Does the E/M note independently support its own level of service, without leaning on the therapy content to justify it?
2. Does the psychotherapy note record exact start and stop times, separate from the E/M encounter?
3. Is modifier 25 appended to the E/M code, and does the total combined time make sense for the length of visit billed?
Sources
American Psychiatric Association, psychiatry.org.
Centers for Medicare & Medicaid Services, Physician Fee Schedule, cms.gov.
AAPC coding resources, aapc.com.
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