F43Header code — not billable
Reaction to severe stress, and adjustment disorders
- Chapter
- 5. Mental, Behavioral and Neurodevelopmental disorders
- Category
- F43
- Effective date
- October 1, 2026
Related codes in category F43
F43.0Acute stress reactionYesF43.1Post-traumatic stress disorder (PTSD)F43.10Post-traumatic stress disorder, unspecifiedYesF43.11Post-traumatic stress disorder, acuteYesF43.12Post-traumatic stress disorder, chronicYesF43.2Adjustment disordersF43.20Adjustment disorder, unspecifiedYesF43.21Adjustment disorder with depressed moodYesF43.22Adjustment disorder with anxietyYesF43.23Adjustment disorder with mixed anxiety and depressed moodYesF43.24Adjustment disorder with disturbance of conductYesF43.25Adjustment disorder w mixed disturb of emotions and conductYes
Frequently asked questions
What is ICD-10 code F43?
F43 is an ICD-10-CM diagnosis code for Reaction to severe stress, and adjustment disorders.
Is F43 a billable code?
No. F43 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is F43 in?
F43 falls under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.
When did F43 become effective?
F43 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to F43?
F43 belongs to category F43, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.