CPT 90837 + ICD-10 F43.21: Adjustment disorder with depressed mood
Psychotherapy, 60 minutes billed with Adjustment disorder with depressed mood — documentation requirements, denial reasons, modifiers, and reimbursement context.
CPT Code
90837
Psychotherapy, 60 minutes
ICD-10 Code
F43.21
Adjustment disorder with depressed mood
Common Modifiers
Compatibility Notes
Common for therapists working with patients navigating identifiable life stressors that have triggered depressed mood. F43.21 is time-limited by definition — symptoms should not persist beyond 6 months after the stressor resolves. Most payers cover this combination for short-term therapy (10–20 sessions) without prior authorization.
Documentation Required
- ✓Session start and stop times confirming 53+ minutes
- ✓Documented stressor(s) with onset date and relationship to current symptoms
- ✓Depressed mood symptoms that are out of proportion to or significantly impairing given the stressor
- ✓Differential: full MDD criteria not met
- ✓Time-limited treatment plan with anticipated resolution timeline
Common Denial Reasons
- ✗Stressor not documented — required for all F43.xx codes
- ✗Symptoms persist well beyond stressor resolution without diagnosis update
- ✗Full MDD criteria appear to be met but the less-specific adjustment disorder code is used — payers may question this during audit
Applicable Modifiers
Reimbursement Notes
OON UCR is $130–$210. Adjustment disorder codes may trigger shorter session authorization counts (12–20 sessions) compared to MDD codes. If sessions exceed the typical authorization, a detailed medical necessity letter is often required.
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