Code directory

Behavioral health CPT & HCPCS code directory

Every billing code guide in one place — time requirements, documentation standards, and the denial reasons that come up most in behavioral health.

• All codes (8)
• Individual Therapy (3)
• Medication Management (5)

• 90791CPT

  Psychiatric diagnostic evaluation

  Individual Therapy Typically 45–60 min

  Initial diagnostic interview without medical services — the standard intake code for a new behavioral health patient.

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• 90834CPT

  Psychotherapy, 45 minutes

  Individual Therapy 38–52 min

  The most common individual session length — a full 45-minute therapy hour.

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• 90837CPT

  Psychotherapy, 60 minutes

  Individual Therapy 53+ min

  Extended individual session, frequently downcoded to 90834 when documentation doesn't support the full hour.

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• 99203CPT

  New patient visit, low complexity

  Medication Management ~30 min

  Initial visit for a new patient with low complexity, often the first appointment with a prescribing provider.

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• 99204CPT

  New patient visit, moderate complexity

  Medication Management ~45 min

  Initial visit for a new patient with moderate complexity, such as starting a new medication plan.

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• 99213CPT

  Established patient visit, low complexity

  Medication Management ~20 min

  Routine med management follow-up for a stable patient, such as a medication check or refill.

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• 99214CPT

  Established patient visit, moderate complexity

  Medication Management ~30 min

  Higher-complexity med management visit — dose changes, side-effect review, or comorbid conditions.

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• 99215CPT

  Established patient visit, high complexity

  Medication Management ~40 min

  Highest-complexity med management visit, for severe symptoms, high-risk medications, or a possible hospitalization.

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Reference content reflects general 2026 CMS and AMA guidance. Codes may be CPT or HCPCS Level II codes; time bands and documentation standards vary by payer and state, so always confirm current-year rates and coverage policy before billing.