2023 ICD-10-CM Diagnosis Code F91.9

Conduct disorder, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • F91.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM F91.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of F91.9 - other international versions of ICD-10 F91.9 may differ.
Applicable To
  • Behavioral disorder NOS
  • Conduct disorder NOS
  • Disruptive behavior disorder NOS
  • Disruptive disorder NOS
The following code(s) above F91.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to F91.9:
  • F01-F99
    2023 ICD-10-CM Range F01-F99

    Mental, Behavioral and Neurodevelopmental disorders

    • disorders of psychological development
    Type 2 Excludes
    • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
    Mental, Behavioral and Neurodevelopmental disorders
  • F90-F98
    2023 ICD-10-CM Range 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
    Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
  • F91
    ICD-10-CM Diagnosis Code F91

    Conduct disorders

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • antisocial behavior (Z72.81-)
    • antisocial personality disorder (F60.2)
    Type 2 Excludes
    • conduct problems associated with attention-deficit hyperactivity disorder (F90.-)
    • mood [affective] disorders (F30-F39)
    • pervasive developmental disorders (F84.-)
    • schizophrenia (F20.-)
    Conduct disorders
Approximate Synonyms
  • Abnormal behavior
  • Abnormal behaviour
  • Behavior disorder
  • Conduct disorder
  • Stroke, late effects, behavioral/cognitive disorder
Clinical Information
  • A classification of disorders in the diagnostic and statistical manual of mental disorders (dsm) that are usually diagnosed in infancy, childhood or adolescence and are characterized by an individual's inability to behave in a cooperative manner.
  • A disorder diagnosed in childhood or adolescence age group characterized by aggressive behavior, deceitfulness, destruction of property or violation of rules that is persistent and repetitive, and within a one year period.
  • A repetitive and persistent pattern of behavior in which the basic rights of others or major age-appropriate societal norms or rules are violated. These behaviors include aggressive conduct that causes or threatens physical harm to other people or animals, nonaggressive conduct that causes property loss or damage, deceitfulness or theft, and serious violations of rules. The onset is before age 18. (from dsm-iv, 1994)
  • Any of various conditions characterized by impairment of an individual's normal behavioral functioning, and caused by social, psychological, biochemical, genetic, or other factors, such as infection or head trauma.
  • Disorders characterized by persistent and repetitive patterns of behavior that violate societal norms or rules or that seriously impair a person's functioning. Compare behavior problems.
  • Mental disorder of childhood and adolescence characterized by repetitive and persistent patterns of conduct in which rights of others and age-appropriate societal rules are violated; the conduct is more serious than ordinary mischief and pranks.
  • Repetitive and persistent aggressive or nonaggressive behavior in which basic rights of others or social norms are violated. Self esteem is generally low, and an inability to develop social relationships and lack of concern for others may or may not be present.
ICD-10-CM F91.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 886 Behavioral and developmental disorders

Convert F91.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to F91.9:

ICD-10-CM Codes Adjacent To F91.9
F90.1 Attention-deficit hyperactivity disorder, predominantly hyperactive type
F90.2 Attention-deficit hyperactivity disorder, combined type
F90.8 Attention-deficit hyperactivity disorder, other type
F90.9 Attention-deficit hyperactivity disorder, unspecified type
F91 Conduct disorders
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
F93 Emotional disorders with onset specific to childhood
F93.0 Separation anxiety disorder of childhood
F93.8 Other childhood emotional disorders
F93.9 Childhood emotional disorder, unspecified
F94 Disorders of social functioning with onset specific to childhood and adolescence
F94.0 Selective mutism
F94.1 Reactive attachment disorder of childhood
F94.2 Disinhibited attachment disorder of childhood
F94.8 Other childhood disorders of social functioning
F94.9 Childhood disorder of social functioning, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.