CPT Codes

CPT (Current Procedural Terminology) codes are a standardized set of five-digit numeric codes maintained by the American Medical Association that describe medical, surgical, and diagnostic services for the purpose of billing insurance and communicating between providers and payers. In behavioral health, CPT codes define the type and duration of each clinical service provided, directly determining reimbursement amounts.

Common Behavioral Health CPT Codes

The most frequently used behavioral health CPT codes include:

• 90791 — Psychiatric diagnostic evaluation (intake assessment, no medical services)
• 90792 — Psychiatric diagnostic evaluation with medical services
• 90832 — Individual psychotherapy, 16-37 minutes
• 90834 — Individual psychotherapy, 38-52 minutes
• 90837 — Individual psychotherapy, 53+ minutes
• 90839 — Psychotherapy for crisis, first 60 minutes
• 90840 — Psychotherapy for crisis, each additional 30 minutes
• 90846 — Family psychotherapy without patient present
• 90847 — Family psychotherapy with patient present
• 90853 — Group psychotherapy
• 99213-99215 — E/M office visit codes (used for medication management)

Time-Based Coding Rules

Behavioral health CPT codes for psychotherapy are time-based, requiring documentation of actual session time. The time ranges are strict — billing 90837 (53+ minutes) for a 45-minute session is improper coding that can trigger audit recoupments. Session start and end times must be documented in the progress note. Time spent on documentation after the patient leaves does not count toward the service time. When psychotherapy and E/M services are provided in the same visit (such as therapy plus medication management), add-on codes 90833, 90836, or 90838 are used.

CPT Codes for Substance Use Treatment

Substance use disorder treatment uses additional CPT and HCPCS codes: H0001 (alcohol and/or drug assessment), H0004 (behavioral health counseling, per 15 minutes), H0005 (alcohol and/or drug services, group counseling), H0015 (alcohol and/or drug services, intensive outpatient), and H0020 (methadone administration). These codes are commonly used in IOP and residential billing, often alongside standard psychotherapy codes.

Modifiers

CPT modifiers provide additional information about a service. Common behavioral health modifiers include 95 (synchronous telehealth), HE (mental health program), HF (substance abuse program), GT (interactive audio and video telecommunications), and 59 (distinct procedural service). Correct modifier usage is essential — missing or incorrect modifiers are a leading cause of claim denials.

CPT Codes and Documentation

Each billed CPT code must be supported by documentation that demonstrates the service was provided as described, the session duration matches the time-based code, the service was medically necessary, and the encounter links to the patient's treatment plan and diagnosis. EHR systems with built-in coding guidance can flag documentation-code mismatches before claim submission, reducing denial risk.

FAQs

What is the most commonly billed behavioral health CPT code?

90834 (individual psychotherapy, 38-52 minutes) is the most frequently billed code in outpatient behavioral health, followed by 90837 (53+ minutes) and 90853 (group psychotherapy).

Can multiple CPT codes be billed for the same patient on the same day?

Yes, if the services are distinct and separately documented. For example, a patient in PHP might receive individual therapy (90837), group therapy (90853), and medication management (99213) on the same day, each requiring its own documentation.

What happens if the wrong CPT code is billed?

Incorrect coding can result in claim denial, underpayment, overpayment requiring recoupment, or audit findings. Systematic upcoding (billing a higher-level code than documented) can constitute fraud and trigger legal consequences.

How often do behavioral health CPT codes change?

The AMA updates CPT codes annually, with changes effective January 1. Behavioral health codes are periodically revised — for example, the psychotherapy codes were significantly restructured in 2013. Practices should review annual updates and adjust billing processes accordingly.

Learn More

• Mental Health CPT Codes: Complete 2026 Guide — Detailed code-by-code reference with Medicare rates
• Substance Abuse Billing Guide — CPT and HCPCS codes for SUD treatment
• Common Therapy Billing Mistakes — Coding errors to avoid
• Best EHR for Mental Health Practices — EHR systems with built-in coding validation