PTSD ICD-10 Codes: F43.10, F43.11, F43.12 and Related Stress Codes (FY2027)
PTSD sits in ICD-10-CM category F43 with the other reactions to severe stress. Its three codes split on whether the record calls it acute or chronic. The most common claim error is the header: F43.1 alone isn't billable.
Short answer
The ICD-10-CM codes for post-traumatic stress disorder are F43.10 (unspecified), F43.11 (acute), and F43.12 (chronic). F43.10 is the code DSM-5-TR lists for PTSD. Related codes are F43.0 for acute stress reaction, F43.81 for prolonged grief disorder, and F43.89 for other reactions to severe stress. F43.1 is a header and isn't billable.
PTSD and related stress codes
| Code | ICD-10-CM title |
|---|---|
| F43.10 | Post-traumatic stress disorder, unspecified |
| F43.11 | Post-traumatic stress disorder, acute |
| F43.12 | Post-traumatic stress disorder, chronic |
| F43.0 | Acute stress reaction |
| F43.81 | Prolonged grief disorder |
| F43.89 | Other reactions to severe stress |
| F43.9 | Reaction to severe stress, unspecified (unspecified) |
Billing notes
- Use the full code. A claim with F43.1 comes back as missing or invalid diagnosis (CO-16, remark M76).
- Acute or chronic only when documented. F43.11 and F43.12 need the record to say so; otherwise F43.10.
- Longer sessions need the note to carry them. Trauma-focused work often runs to 90837. Document the time and why.
- Adjustment disorders are next door. Stress reactions that don't meet PTSD criteria are often F43.2x.
More codes: behavioral health ICD-10 codes.
Code titles from the FY2027 ICD-10-CM code set (CDC/NCHS), effective October 1, 2026 through September 30, 2027. Diagnosis is a clinical decision; this page covers how codes behave on claims, not how to diagnose.
Frequently asked questions
What is the ICD-10 code for PTSD?
F43.10 (unspecified), F43.11 (acute), or F43.12 (chronic). F43.10 is the code DSM-5-TR lists for PTSD.
Is F43.1 a billable code?
No. F43.1 is a category header. Bill F43.10, F43.11, or F43.12.
What is the ICD-10 code for prolonged grief disorder?
F43.81, Prolonged grief disorder.
No more header codes on claims.
Stable checks every diagnosis for a billable, specific code before the claim is sent.
Book a Demo