2026 ICD-10-CM Diagnosis Code F91.0Conduct disorder confined to family context

ICD-10-CM Codes›F01–F99›F90-F98›F91

ICD-10-CM F91.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F91.0 is a billable ICD-10-CM diagnosis code for conduct disorder confined to family context. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as conduct disorder - in family context. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Disruptive, impulse-control and conduct disorders.

Code Identity

ICD-10-CM Code
F91.0
Billable Status
Yes — Valid for Submission
Code Describes
Conduct disorder confined to family context
Short Description
Conduct disorder confined to family context
Same as the full description in the CMS dataset.
Parent Code
F91
Conduct disorders

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF90-F98Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
CategoryF91Conduct disorders
This CodeF91.0Conduct disorder confined to family context

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Conduct disorder - in family context
  • Sibling jealousy

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Disorder(of)
      • conduct (childhood)
        • confined to family context

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD008
Disruptive, impulse-control and conduct disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F91.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
312.89 Other conduct disorder
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F91.0Overview

Is F91.0 (Conduct disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report conduct disorder confined to family context on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of F91.0?

Under the General Equivalence Mappings, conduct disorder confined to family context converts to ICD-9-CM 312.89 (other conduct disorder). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.