ICD-10-CM 2027
ICD-10 code for PTSD (post-traumatic stress disorder)
Confirmed by the official ICD-10-CM index entry “disorder (of) › post-traumatic stress (ptsd)”. Page updated September 29, 2026.
About coding PTSD
The ICD-10-CM code for PTSD (post-traumatic stress disorder) is F43.10 (Post-traumatic stress disorder, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F43.10.
Within F43.1, choose F43.10 (unspecified) only when documentation doesn't support a more specific option: acute (F43.11) and chronic (F43.12).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 882 (Neuroses Except Depressive, relative weight 0.9952), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Related PTSD codes
Common questions about PTSD ICD-10 codes
What is the ICD-10 code for PTSD?
- F43.10 — Post-traumatic stress disorder, unspecified. More specific codes apply when the documentation supports them: F43.11, F43.12.
What is the ICD-10 code for post-traumatic stress disorder, acute?
- F43.11 — Post-traumatic stress disorder, acute.
What is the ICD-10 code for post-traumatic stress disorder, chronic?
- F43.12 — Post-traumatic stress disorder, chronic.
Is F43.10 billable?
- Yes. F43.10 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F43.10 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F43.10 as a principal diagnosis.
Is F43.10 a CC or MCC?
- No. F43.10 is neither a CC nor an MCC under MS-DRG v44.0.