F91 ICD-10-CM Code: Conduct disorders
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
F91Conduct disorders
ICD-10-CM diagnosis code · United States clinical modification
Where F91 sits
- 1
Chapter 5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
- 2
Section
Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98)
- 3
Category F91
Conduct disorders
- 4
Code F91
Conduct disorders
Codes under F91
F91 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 F91.
Code first
No “code first” instruction is listed for F91.
Use additional code
No “use additional code” instruction is listed for F91.
Excludes1
Conditions that should not be reported together with this code.
- antisocial behavior (Z72.81-)
- antisocial personality disorder (F60.2)
Excludes2
Conditions not included here that may be reported separately when present.
- conduct problems associated with attention-deficit hyperactivity disorder (F90.-)
- mood [affective] disorders (F30-F39)
- pervasive developmental disorders (F84.-)
- schizophrenia (F20.-)
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 F91 mean?
F91 is the FY 2027 U.S. ICD-10-CM code for “Conduct disorders.”
Is F91 a billable or specific ICD-10-CM code?
No. F91 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 F91 located in ICD-10-CM?
F91 is listed in Chapter 5, Mental, Behavioral and Neurodevelopmental disorders (F01-F99), within Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98) (F90–F98), under category F91, Conduct disorders.
What coding notes are listed for F91?
No inclusion terms are listed for F91 in this reference record. No code-first instruction is listed. Excludes1 notes: antisocial behavior (Z72.81-); antisocial personality disorder (F60.2). Excludes2 notes: conduct problems associated with attention-deficit hyperactivity disorder (F90.-); mood [affective] disorders (F30-F39); pervasive developmental disorders (F84.-); schizophrenia (F20.-).