CPT 90834 + ICD-10 F31.9: Bipolar disorder, unspecified
Psychotherapy, 45 minutes billed with Bipolar disorder, unspecified — documentation requirements, denial reasons, modifiers, and reimbursement context.
CPT Code
90834
Psychotherapy, 45 minutes
ICD-10 Code
F31.9
Bipolar disorder, unspecified
Compatibility Notes
Used for 45-minute psychotherapy sessions with bipolar disorder patients. Appropriate during the diagnostic evaluation period before a specific bipolar subtype is established. Payers expect code refinement after initial sessions. Psychotherapy is an evidence-based adjunct to pharmacotherapy for bipolar disorder.
Documentation Required
- ✓Session start and stop times confirming 38–52 minutes
- ✓Bipolar disorder with mood episode history
- ✓Current mood state documented
- ✓Coordination with prescriber referenced
- ✓Safety screen
Common Denial Reasons
- ✗Chronic use of unspecified bipolar code without subtype refinement
- ✗No documentation of medication management collaboration
- ✗Session time outside 38–52 minute range
Applicable Modifiers
Reimbursement Notes
OON UCR $100–$165. Bipolar disorder psychotherapy is covered under mental health parity; document ongoing clinical need at each authorization period.
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