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

  1. F91 Conduct disorders

    1. F91.0 Conduct disorder confined to family context

    2. F91.1 Conduct disorder, childhood-onset type

      Inclusion term(s):

      • Unsocialized conduct disorder
      • Conduct disorder, solitary aggressive type
      • Unsocialized aggressive disorder
    3. F91.2 Conduct disorder, adolescent-onset type

      Inclusion term(s):

      • Socialized conduct disorder
      • Conduct disorder, group type
    4. F91.3 Oppositional defiant disorder

    5. F91.8 Other conduct disorders

      Inclusion term(s):

      • Other specified conduct disorder
      • Other specified disruptive disorder
    6. F91.9 Conduct disorder, unspecified

      Inclusion term(s):

      • Behavioral disorder NOS
      • Conduct disorder NOS
      • Disruptive behavior disorder NOS
      • Disruptive disorder NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.