F91
Conduct disorders
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
F91 is a non-billable ICD-10-CM code category for conduct disorders. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are F91.0 Conduct disorder confined to family context; F91.1 Conduct disorder, childhood-onset type; F91.2 Conduct disorder, adolescent-onset type; F91.3 Oppositional defiant disorder and 2 more. Its coding notes include 2 Excludes1 entries and 5 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
This code
Also from chapter/block level (1 note)
Inherited from Chapter 5 Mental, Behavioral and Neurodevelopmental disorders
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Includes
Further defines or gives examples of the content of the category.
Also from chapter/block level (1 note)
Inherited from Chapter 5 Mental, Behavioral and Neurodevelopmental disorders
- disorders of psychological development
Notes
Also from chapter/block level (1 note)
Inherited from F90–F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
- Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood