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CPT 90834 + ICD-10 F31.81: Bipolar II disorder

Psychotherapy, 45 minutes billed with Bipolar II disorder — documentation requirements, denial reasons, modifiers, and reimbursement context.

CPT Code
90834
Psychotherapy, 45 minutes
ICD-10 Code
F31.81
Bipolar II disorder
Common Modifiers

Compatibility Notes

Appropriate for 45-minute psychotherapy sessions with Bipolar II patients. IPSRT, CBT, and DBT are evidence-based modalities for Bipolar II. Medication management collaboration should be documented. Most payers cover this without prior authorization for standard outpatient sessions.

Documentation Required

  • Session start and stop times confirming 38–52 minutes
  • Bipolar II diagnosis with hypomanic and depressive episode history
  • Current mood state
  • Psychotherapy modality appropriate for bipolar disorder
  • Prescriber coordination noted
  • Safety screen

Common Denial Reasons

  • Notes do not reflect clinical complexity of bipolar disorder management
  • Hypomania criteria not documented in the record
  • Session time outside 38–52 minute range

Applicable Modifiers

Reimbursement Notes

OON UCR $100–$165. Bipolar II is a chronic condition; annual authorization renewals are common. Mental health parity protects against disproportionate benefit restrictions.

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