PTSD in DSM-5-TR and ICD-11
PTSD is the biggest current example of the two diagnostic systems taking different approaches. ICD-11 (2022) narrowed PTSD to three core symptom clusters and added a separate diagnosis, complex PTSD. DSM-5-TR expanded PTSD to four broad clusters and does not include complex PTSD. A person can meet criteria in one system and not the other. This is what actually differs.
DSM-5-TR Posttraumatic stress disorder ICD-10-CM F43.10
ICD-11 Post-traumatic stress disorder 6B40
Side by side
| What | DSM-5-TR | ICD-11 |
|---|---|---|
| Structure of symptom clusters Different structure. ICD-11 removed several symptoms that DSM-5-TR treats as PTSD features (guilt, shame, mood changes, dissociative amnesia). | Four clusters: intrusion, avoidance, negative alterations in cognitions and mood, alterations in arousal and reactivity. | Three clusters: re-experiencing in the here and now, avoidance, and persistent sense of current threat. |
| Required symptom count ICD-11 has a much lower symptom threshold, but focuses on the tighter core cluster. | At least 1 intrusion, 1 avoidance, 2 negative cognition/mood, and 2 arousal/reactivity symptoms. | At least 1 re-experiencing, 1 avoidance, and 1 sense of current threat symptom. |
| Types of trauma exposure DSM-5-TR is more explicit about first-responder exposure counting. | Direct experience, witnessing, learning it happened to a close person, or repeated professional exposure to details of trauma (e.g., first responders). | Exposure to an event of an extremely threatening or horrific nature. Less specific about indirect or professional exposure. |
| Duration Similar in practice. | Symptoms present for more than 1 month. | Symptoms present for several weeks. |
| Functional impairment Aligned. | Symptoms cause clinically significant distress or impairment. | Symptoms cause significant impairment in personal, family, social, educational, occupational, or other important areas. |
| Dissociative subtype Different. | 'With dissociative symptoms' (depersonalization or derealization) is a specifier. | No dissociative subtype. Dissociation is captured in the separate dissociative disorders chapter. |
| Complex PTSD This is the biggest structural difference between the two systems. | Not included. Complex trauma presentations are typically captured as PTSD plus other diagnoses. | Complex PTSD (6B41): PTSD plus persistent disturbances in emotion regulation, self-concept, and relationships. |
| Delayed onset | Specifier: 'with delayed expression' when symptoms don't reach full criteria for at least 6 months after event. | Not formally specified; delayed onset is allowed within the diagnosis. |
Key differences
- ICD-11 tightened PTSD to three core symptom clusters and added complex PTSD as a separate diagnosis (6B41). DSM-5-TR uses four clusters and does not have complex PTSD.
- ICD-11 PTSD has a lower symptom threshold (3 symptoms across 3 clusters) than DSM-5-TR (6 symptoms across 4 clusters).
- Many symptoms that DSM-5-TR treats as PTSD (guilt, shame, mood changes, dissociative amnesia) were removed from ICD-11 PTSD and are captured by complex PTSD or by co-occurring conditions.
- DSM-5-TR includes a dissociative subtype specifier. ICD-11 does not.
- In practice, ICD-11 PTSD is a narrower diagnosis capturing the more classical fear-based presentation. Complex PTSD captures the presentations that DSM-5-TR would call PTSD with prominent negative mood/self-concept changes.
Clinical implications
- A person diagnosed with DSM-5-TR PTSD may or may not meet ICD-11 PTSD criteria. Those with prominent emotion regulation, self-concept, and relationship difficulties will often shift to ICD-11 complex PTSD.
- For chronic childhood trauma, prolonged intimate-partner violence, captivity, and combat, complex PTSD in ICD-11 more accurately captures the picture than PTSD alone.
- Treatment principles overlap heavily. Trauma-focused psychotherapy is first-line for both PTSD and complex PTSD, with phase-based work for complex presentations.
- In US research and clinical practice, DSM-5-TR is standard. In international and WHO-affiliated settings, ICD-11 with complex PTSD is increasingly used. Papers now often report both.
## Why this crosswalk exists
The PTSD crosswalk is the most consequential of the DSM/ICD comparisons because the two systems now diverge substantially. If you are being told your trauma picture is or is not PTSD, the answer may depend on which system your clinician is using. Complex PTSD is the biggest addition in ICD-11, and it captures a real clinical picture that DSM-5-TR does not name separately.
## Sources
- American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). Section on Trauma- and Stressor-Related Disorders. 2022.
- World Health Organization. International Classification of Diseases 11th Revision (ICD-11). Chapter 6, 6B40 PTSD, 6B41 Complex PTSD. 2022.
- Brewin CR, Cloitre M, Hyland P, et al. A review of current evidence regarding the ICD-11 proposals for diagnosing PTSD and complex PTSD. Clinical Psychology Review. 2017;58:1-15.
- Maercker A, Brewin CR, Bryant RA, et al. Diagnosis and classification of disorders specifically associated with stress: proposals for ICD-11. World Psychiatry. 2013;12(3):198-206.
- Karatzias T, Cloitre M, Maercker A, et al. PTSD and Complex PTSD: ICD-11 updates on concept and measurement in the UK, USA, Germany and Lithuania. European Journal of Psychotraumatology. 2017;8(sup7):1418103.