ICD-10 codes for PTSD
Post-traumatic stress disorder codes to F43.1- in ICD-10-CM. F43.10 is unspecified, F43.11 is acute and F43.12 is chronic. The ICD-10-CM index lists PTSD with no further detail under F43.10.
Post-traumatic stress disorder (F43.1)
Subcategory F43.1 includes traumatic neurosis.
- F43.10 Post-traumatic stress disorder, unspecified
- F43.11 Post-traumatic stress disorder, acute
- F43.12 Post-traumatic stress disorder, chronic
Other reactions to severe stress (F43)
Category F43 also holds acute stress reaction, prolonged grief disorder, and the other and unspecified stress reactions. Adjustment disorders are F43.2-.
- F43.0 Acute stress reaction
- F43.81 Prolonged grief disorder
- F43.89 Other reactions to severe stress
- F43.9 Reaction to severe stress, unspecified
Every code listed is billable. Descriptions are reproduced verbatim from the FY2027 ICD-10-CM code set (CDC/NCHS and CMS), effective October 1, 2026 - September 30, 2027, and were checked on . Codes with an arrow have their own page.
Coding notes
- Neither the tabular list nor the official guidelines set a time threshold for acute or chronic PTSD. Code what the provider documents, and use F43.10 when the record doesn't say.
- Acute stress reaction is F43.0. Its inclusion terms include acute crisis reaction, combat fatigue and crisis state.
- ICD-10-CM has no code or index entry for complex PTSD.
- Category F41 has an Excludes2 note for anxiety in acute stress reaction (F43.0). An anxiety disorder code and F43.0 may both be reported when the person has both.
- F43.8 is a heading, not a billable code. Use F43.81 or F43.89.
CPT code reference
ICD-10-CM codes describe the diagnosis. CPT codes describe the service. These are the CPT code pages on this site for therapy services.
- 90791 Psychiatric diagnostic evaluation (intake) Per session Medicare rate $173.35
- 90834 45-minute individual psychotherapy 38 to 52 minutes Medicare rate $113.90
- 90837 60-minute individual psychotherapy 53 minutes or longer Medicare rate $167.00
- 96127 Brief emotional or behavioral assessment Per instrument Medicare rate $5.01
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Frequently asked questions
What is the ICD-10 code for PTSD?
F43.10, Post-traumatic stress disorder, unspecified, when the record doesn't say acute or chronic. F43.11 is acute and F43.12 is chronic. The ICD-10-CM index lists PTSD with no further detail under F43.10.
What is the difference between F43.10 and F43.12?
F43.10 is post-traumatic stress disorder, unspecified, and F43.12 is post-traumatic stress disorder, chronic. ICD-10-CM doesn't define chronic, so use F43.12 when the provider documents the PTSD as chronic.
What is the ICD-10 code for complex PTSD?
ICD-10-CM has no code titled complex PTSD and no index entry for it. Code the diagnosis the clinician documents, such as F43.10 or F43.12 for post-traumatic stress disorder.
Sources
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, so 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.