CPT 90837 + ICD-10 F34.1: Dysthymic disorder (persistent depressive disorder)
Psychotherapy, 60 minutes billed with Dysthymic disorder (persistent depressive disorder) — documentation requirements, denial reasons, modifiers, and reimbursement context.
CPT Code
90837
Psychotherapy, 60 minutes
ICD-10 Code
F34.1
Dysthymic disorder (persistent depressive disorder)
Compatibility Notes
F34.1 is used for Persistent Depressive Disorder (dysthymia) — a chronic, low-grade depressive condition lasting at least 2 years in adults. Psychotherapy (particularly behavioral activation, CBASP, or CBT) is the first-line treatment. Most payers cover long-term therapy for this diagnosis given its chronic nature, though annual authorization renewals are common.
Documentation Required
- ✓Session start and stop times confirming 53+ minutes
- ✓PDD diagnosis with documented duration of 2+ years of depressive symptoms
- ✓PHQ-9 or equivalent tracking over time
- ✓Chronic depressive course distinguished from episodic MDD in clinical notes
- ✓Treatment plan addressing the long-term nature of the condition
- ✓Risk assessment for suicidal ideation
Common Denial Reasons
- ✗Duration of depressive symptoms not documented — F34.1 requires a 2-year minimum course
- ✗Insurer prefers F33.x (recurrent MDD) codes — document the distinction in the record
- ✗Session time below 53 minutes without code correction
Applicable Modifiers
Reimbursement Notes
OON UCR $130–$210. PDD is a chronic condition; payers should authorize ongoing therapy under mental health parity. Document functional impairment and treatment response at each authorization renewal.
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