Is F91 a billable code?
No. F91 is a header code that groups 6 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
F91: Conduct disorders
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
F91 groups related diagnoses under conduct disorders. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
F91 questions
What does F91 mean?
F91 is the ICD-10-CM code for Conduct disorders. It is in chapter 5, Mental, behavioral and neurodevelopmental disorders (F01-F99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.