2024 ICD-10-CM Diagnosis Code F91.9

Conduct disorder, unspecified

ICD-10-CM Code:
F91.9
ICD-10 Code for:
Conduct disorder, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
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)

F91.9 is a billable diagnosis code used to specify a medical diagnosis of conduct disorder, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like F91.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abnormal behavior
  • Behavior problem of childhood and adolescence
  • Behavioral disability
  • Conduct disorder
  • Conduct disorder in remission
  • Disruptive behavior
  • Disruptive behavior disorder
  • Intellectual disability, macrocephaly, hypotonia, behavioral abnormalities syndrome
  • Micrognathia, recurrent infections, behavioral abnormalities, mild intellectual disability syndrome
  • Mixed behavior and emotional disorder
  • Problem behavior
  • Problem behavior in adult
  • Ran away
  • Self destructive behavior
  • WAC-related facial dysmorphism, developmental delay, behavioral abnormalities syndrome
  • X-linked epilepsy with learning disability and behavior disorder syndrome

Clinical Classification

Clinical Information

  • Conduct Disorder

    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)
  • Problem Behavior

    troublesome or disruptive behavioral displays.
  • Conduct Disorder

    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.

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.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Behavioral disorder NOS
  • Conduct disorder NOS
  • Disruptive behavior disorder NOS
  • Disruptive disorder NOS

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert F91.9 to ICD-9-CM

  • ICD-9-CM Code: 312.9 - Conduct disturbance NOS

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.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.