ICD-10-CM F43.10

ICD-10 Code F43.10: Post-traumatic stress disorder, unspecified

F43.10 is the ICD-10-CM code for post-traumatic stress disorder, unspecified. DSM-5-TR uses F43.10 for PTSD, so it is the code most therapists report.

Official description
Post-traumatic stress disorder, unspecified
Billable
Yes
Parent category
F43.1 · Post-traumatic stress disorder (PTSD)
DSM-5-TR name
Posttraumatic stress disorder

Verified against the FY2027 ICD-10-CM code set (CDC/NCHS and CMS), effective October 1, 2026 - September 30, 2027, on . Chapter 5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99).

Coding notes for F43.10

  • DSM-5-TR PTSD codes to F43.10
  • ICD-10-CM also has F43.11 (acute) and F43.12 (chronic)
  • Acute stress reaction is F43.0, and adjustment disorders are F43.2-

What to document for medical necessity

Payers look for a record that supports the diagnosis and the level of care. For trauma and stress-related disorders that usually means:

  • The stressor or traumatic event and when it happened
  • Current symptoms and their duration, since timing separates several of these codes
  • A scored measure where one fits, such as the PCL-5
  • Functional impairment and any safety concerns
  • Treatment plan goals tied to the trauma-related symptoms

CPT codes often billed with F43.10

The ICD-10 code says why you are treating the client and the CPT code says what you did. These are the service codes most often paired with F43.10:

90791 · Psychiatric diagnostic evaluation (intake) 90834 · 45-minute individual psychotherapy 90837 · 60-minute individual psychotherapy

Free templates for this diagnosis

Related ICD-10 codes

F43.0 · Acute stress reaction F43.89 · Other reactions to severe stress F43.22 · Adjustment disorder with anxiety F43.23 · Adjustment disorder with mixed anxiety and depressed mood

Frequently asked questions

What is the ICD-10 code for PTSD?

F43.10 (Post-traumatic stress disorder, unspecified) is the code DSM-5-TR uses for PTSD. F43.11 is acute and F43.12 is chronic.

Should I use F43.10 or F43.12?

Both are valid. F43.10 matches the DSM-5-TR crosswalk. F43.12 specifies chronic PTSD, and some clinicians use it when duration is documented. Check whether your payer has a preference.

This page is a coding reference, not clinical, diagnostic, billing, or legal advice. The diagnosis is the treating clinician's call, and payer rules vary - always confirm against the current ICD-10-CM code set and official guidelines and your payer's policy. See the full mental health ICD-10 code list.