F91

Non-Billable

ChapterF01–F99

Rankcategory

Official Description

Conduct disorders

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (F01-F99).

CH5 Parent Instructions

Includes

disorders of psychological development

Excludes2(Not included here)

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Instructional Notes

Excludes1(Not coded here)

antisocial behavior (Z72.81-)
antisocial personality disorder (F60.2)

Excludes2(Not included here)

conduct problems associated with attention-deficit hyperactivity disorder (F90.-)
mood [affective] disorders (F30-F39)
pervasive developmental disorders (F84.-)
schizophrenia (F20.-)

Clinical Hierarchy

CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

F90-F98Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98)

F91Conduct disorders

F91.0Conduct disorder confined to family context

F91.1Conduct disorder, childhood-onset type

F91.2Conduct disorder, adolescent-onset type

F91.3Oppositional defiant disorder

F91.8Other conduct disorders

F91.9Conduct disorder, unspecified

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to F91:

chapterCH5

Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to F91. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths

Delinquency (juvenile) (neurotic)1 unique routes

Direct index entry→F91

Disorder (of)17 unique routes

aggressive, unsocialized→F91

conduct (childhood)→F91(11 variants)

adolescent onset type→F91

childhood onset type→F91

confined to family context→F91

depressive→F91

group type→F91

oppositional defiance→F91