Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98)
F91: Conduct disorders

excludes1
antisocial behavior (Z72.81-)
antisocial personality disorder (F60.2)

excludes2
conduct problems associated with attention-deficit hyperactivity disorder (F90.-)
mood [affective] disorders (F30-F39)
pervasive developmental disorders (F84.-)
schizophrenia (F20.-)
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
F91.8: Other conduct disorders
F91.9: Conduct disorder, unspecified

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