CPT Code Framework for Behavioral Health
Behavioral health billing uses a distinct set of CPT codes that differ significantly from medical specialty billing. The codes are structured around service type (individual therapy, group therapy, family therapy), duration, and whether the session includes medication management. Understanding these code categories and their reimbursement rates is foundational to running a financially viable behavioral health practice.
The behavioral health code set experienced major revisions in recent years, consolidating older codes and creating clearer distinctions between psychotherapy, psychiatric services, and crisis intervention. Practices that have not updated their coding practices since these changes risk using deleted codes that trigger automatic rejections.
Psychotherapy Codes (90832-90838)
Individual psychotherapy is billed based on session duration. Code 90832 covers 16-37 minutes, 90834 covers 38-52 minutes, and 90837 covers 53 minutes or longer. The 90834 (38-52 minute session) is the most commonly billed psychotherapy code, aligning with the standard 45-minute therapy hour. Medicare reimburses 90834 at approximately $95 and 90837 at approximately $130.
Time documentation is critical. The medical record must include the start and stop time of the psychotherapy session or the total number of minutes spent in face-to-face psychotherapy. Rounding up from 35 minutes to code 90834 (which requires a minimum of 38 minutes) is a compliance risk that payers audit specifically in behavioral health.
Psychiatric Evaluation (90791, 90792)
Initial psychiatric evaluations use code 90791 (diagnostic evaluation without medical services) or 90792 (diagnostic evaluation with medical services). The distinction matters: 90792 is used when the psychiatrist performs a medical evaluation and may initiate medication management during the same visit. Reimbursement for 90792 is approximately $175 under Medicare, reflecting the medical component.
Add-On Codes for Medication Management
When psychotherapy is provided during the same session as an E/M service with medication management, add-on codes 90833, 90836, and 90838 replace the standalone psychotherapy codes. These add-on codes are billed in addition to the E/M code (99213-99215) and capture the psychotherapy component. This combination billing approach is common in psychiatry where patients receive both therapy and medication adjustments in a single visit.
Group and Family Therapy
Group psychotherapy (90853) covers sessions with multiple patients simultaneously. Medicare reimburses approximately $32 per patient per session. Family psychotherapy codes include 90846 (without the patient present) and 90847 (with the patient present), reimbursing at approximately $95 and $105 respectively.
Crisis and Intensive Services
Crisis psychotherapy (90839 for the first 60 minutes, 90840 for each additional 30 minutes) covers emergency behavioral health intervention. These codes reimburse at premium rates because of the clinical urgency and extended duration. Behavioral health practices that provide crisis services should ensure their billing team understands the time-based documentation requirements for these codes.
Telehealth Modifier
Behavioral health has the highest telehealth utilization rate of any specialty. Telehealth psychotherapy sessions are billed with the same CPT codes (90832-90837) plus modifier 95 (synchronous telemedicine) or the place of service code 10 (telehealth in patient home). Reimbursement for telehealth behavioral health services is at parity with in-person services under most commercial plans and Medicare.