CPT 90837 + ICD-10 F31.9: Bipolar disorder, unspecified
Psychotherapy, 60 minutes billed with Bipolar disorder, unspecified — documentation requirements, denial reasons, modifiers, and reimbursement context.
CPT Code
90837
Psychotherapy, 60 minutes
ICD-10 Code
F31.9
Bipolar disorder, unspecified
Compatibility Notes
Used for ongoing psychotherapy with bipolar disorder patients where the specific episode type has not been determined or documented in the current period. F31.9 is appropriate at intake or during diagnostic uncertainty. After a few sessions, most payers expect a more specific code (e.g., F31.81 for Bipolar II). Psychotherapy is an essential adjunct to medication management for bipolar disorder.
Documentation Required
- ✓Session start and stop times confirming 53+ minutes
- ✓Bipolar disorder diagnosis with mood episode history documented
- ✓Current mood state (euthymic, depressed, hypomanic, manic) noted in session
- ✓Medication adherence and coordination with prescriber referenced
- ✓Safety screen for suicidal ideation
- ✓Plan to specify bipolar subtype within 2–3 sessions
Common Denial Reasons
- ✗Chronic use of unspecified bipolar code — payers expect specificity after initial evaluation period
- ✗Psychotherapy provided without evidence of concurrent medication management for a severe bipolar presentation
- ✗Notes do not reflect the complexity of bipolar disorder management
Applicable Modifiers
Reimbursement Notes
OON UCR $130–$210. Bipolar disorder often requires ongoing psychotherapy alongside pharmacotherapy; parity rules protect this combination from being denied as medically unnecessary when documentation supports it.
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