F43: Reaction to severe stress, and adjustment disorders

Codes under F43 (Reaction to severe stress, and adjustment disorders). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
F43.0	Acute stress reaction	✓
F43.1	Post-traumatic stress disorder (PTSD)	—
F43.2	Adjustment disorders	—
F43.8	Other reactions to severe stress	—
F43.9	Reaction to severe stress, unspecified	✓
F43.10	Post-traumatic stress disorder, unspecified	✓
F43.11	Post-traumatic stress disorder, acute	✓
F43.12	Post-traumatic stress disorder, chronic	✓
F43.20	Adjustment disorder, unspecified	✓
F43.21	Adjustment disorder with depressed mood	✓
F43.22	Adjustment disorder with anxiety	✓
F43.23	Adjustment disorder with mixed anxiety and depressed mood	✓
F43.24	Adjustment disorder with disturbance of conduct	✓
F43.25	Adjustment disorder with mixed disturbance of emotions and conduct	✓
F43.29	Adjustment disorder with other symptoms	✓
F43.81	Prolonged grief disorder	✓
F43.89	Other reactions to severe stress	✓

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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

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