ICD-10 Code F43.12 – Post-traumatic stress disorder, chronic (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F43.12 – Post-traumatic stress disorder, chronic
What it is
F43.12 identifies chronic post-traumatic stress disorder, a trauma-related mental health condition that persists over time. Use it when the record documents PTSD as chronic or ongoing.
Clinical signs
Common features include intrusive memories, nightmares, avoidance of trauma reminders, negative mood changes, and heightened arousal. Clinical features vary; refer to documentation.
When to use this code
Use F43.12 when the clinician clearly documents chronic PTSD, or PTSD with a long-standing course. It applies when the condition is active and being evaluated or managed, not merely a remote history. Check documentation if the note does not distinguish chronic from acute or unspecified PTSD.
Do not use for
Do not use this code for acute stress reactions, adjustment disorders, or a past history of trauma without current PTSD. If the record only says “PTSD” without chronicity, check documentation.
Coding tip
Code F43.12 only when the provider explicitly documents chronic PTSD or an equivalent ongoing diagnosis.