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 | ✓ |
| F43.0 | Acute stress reaction | ✓ |
| F43.1 | Post-traumatic stress disorder (PTSD) | — |
| F43.1 | Post-traumatic stress disorder (PTSD) | — |
| F43.2 | Adjustment disorders | — |
| F43.2 | Adjustment disorders | — |
| F43.8 | Other reactions to severe stress | — |
| F43.8 | Other reactions to severe stress | — |
| F43.9 | Reaction to severe stress, unspecified | ✓ |
| F43.9 | Reaction to severe stress, unspecified | ✓ |
| F43.10 | Post-traumatic stress disorder, unspecified | ✓ |
| F43.10 | Post-traumatic stress disorder, unspecified | ✓ |
| F43.11 | Post-traumatic stress disorder, acute | ✓ |
| F43.11 | Post-traumatic stress disorder, acute | ✓ |
| F43.12 | Post-traumatic stress disorder, chronic | ✓ |
| F43.12 | Post-traumatic stress disorder, chronic | ✓ |
| F43.20 | Adjustment disorder, unspecified | ✓ |
| F43.20 | Adjustment disorder, unspecified | ✓ |
| F43.21 | Adjustment disorder with depressed mood | ✓ |
| F43.21 | Adjustment disorder with depressed mood | ✓ |
| F43.22 | Adjustment disorder with anxiety | ✓ |
| F43.22 | Adjustment disorder with anxiety | ✓ |
| F43.23 | Adjustment disorder with mixed anxiety and depressed mood | ✓ |
| F43.23 | Adjustment disorder with mixed anxiety and depressed mood | ✓ |
| F43.24 | Adjustment disorder with disturbance of conduct | ✓ |
| F43.24 | Adjustment disorder with disturbance of conduct | ✓ |
| F43.25 | Adjustment disorder with mixed disturbance of emotions and conduct | ✓ |
| F43.25 | Adjustment disorder with mixed disturbance of emotions and conduct | ✓ |
| F43.29 | Adjustment disorder with other symptoms | ✓ |
| F43.29 | Adjustment disorder with other symptoms | ✓ |
| F43.81 | Prolonged grief disorder | ✓ |
| F43.81 | Prolonged grief disorder | ✓ |
| F43.89 | Other reactions to severe stress | ✓ |
| F43.89 | Other reactions to severe stress | ✓ |
Frequently asked questions
What is ICD-10-CM code F43?
F43 is an ICD-10-CM category covering Reaction to severe stress, and adjustment disorders. It contains 34 more specific diagnosis codes, 28 of which are billable.
Is F43 a billable code?
No — F43 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example F43.0 — Acute stress reaction). 28 of the 34 codes under F43 are billable.
What codes fall under F43?
F43 includes F43.0, F43.0, F43.1, F43.1, F43.2, plus 29 more. See the full list with descriptions and billable status above.
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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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