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  6. 2024 ICD-10-CM Code F91
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code F91

Conduct disorders

ICD-10-CM Code:
F91
ICD-10 Code for:
Conduct disorders
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Mental and behavioural disorders
    (F01–F99)
    • Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
      (F90-F98)
      • Conduct disorders
        (F91)

F91 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of conduct disorders. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Conduct disorders

Non-specific codes like F91 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for conduct disorders:

  • Use F91.0 for Conduct disorder confined to family context - BILLABLE CODE

  • Use F91.1 for Conduct disorder, childhood-onset type - BILLABLE CODE

  • Use F91.2 for Conduct disorder, adolescent-onset type - BILLABLE CODE

  • Use F91.3 for Oppositional defiant disorder - BILLABLE CODE

  • Use F91.8 for Other conduct disorders - BILLABLE CODE

  • Use F91.9 for Conduct disorder, unspecified - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • antisocial behavior Z72.81
  • antisocial personality disorder F60.2

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • conduct problems associated with attention-deficit hyperactivity disorder F90
  • mood affective disorders F30 F39
  • pervasive developmental disorders F84
  • schizophrenia F20

Patient Education


Child Behavior Disorders

All kids misbehave some times. And some may have temporary behavior problems due to stress. For example, the birth of a sibling, a divorce, or a death in the family may cause a child to act out. Behavior disorders are more serious. They involve a pattern of hostile, aggressive, or disruptive behaviors for more than 6 months. The behavior is also not appropriate for the child's age.

Warning signs can include:

  • Harming or threatening themselves, other people or pets
  • Damaging or destroying property
  • Lying or stealing
  • Not doing well in school, skipping school
  • Early smoking, drinking or drug use
  • Early sexual activity
  • Frequent tantrums and arguments
  • Consistent hostility toward authority figures

If you see signs of a problem, ask for help. Poor choices can become habits. Kids who have behavior problems are at higher risk for school failure, mental health problems, and even suicide. Classes or family therapy may help parents learn to set and enforce limits. Talk therapy and behavior therapy for your child can also help.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.