F43 ICD-10-CM Code: Reaction to severe stress, and adjustment disorders
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
F43Reaction to severe stress, and adjustment disorders
ICD-10-CM diagnosis code · United States clinical modification
Where F43 sits
- 1
Chapter 5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
- 2
Section
Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48)
- 3
Category F43
Reaction to severe stress, and adjustment disorders
- 4
Code F43
Reaction to severe stress, and adjustment disorders
Codes under F43
F43 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for F43.
Code first
No “code first” instruction is listed for F43.
Use additional code
No “use additional code” instruction is listed for F43.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for F43.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for F43.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code F43 mean?
F43 is the FY 2027 U.S. ICD-10-CM code for “Reaction to severe stress, and adjustment disorders.”
Is F43 a billable or specific ICD-10-CM code?
No. F43 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is F43 located in ICD-10-CM?
F43 is listed in Chapter 5, Mental, Behavioral and Neurodevelopmental disorders (F01-F99), within Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48) (F40–F48), under category F43, Reaction to severe stress, and adjustment disorders.
What coding notes are listed for F43?
No inclusion terms are listed for F43 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.