ICD-10-CM 2027
ICD-10 code for Unsocialized aggressive disorder
From the official ICD-10-CM alphabetic index entry “Disorder (of) › unsocialized aggressive”. Page updated September 29, 2026.
About coding Unsocialized aggressive disorder
The ICD-10-CM code for Unsocialized aggressive disorder is F91.1 (Conduct disorder, childhood-onset type).
Within F91 (conduct disorders), F91.1 is specifically for conduct disorder, childhood-onset type. Related codes cover conduct disorder confined to family context (F91.0), conduct disorder, adolescent-onset type (F91.2), Oppositional defiant disorder (F91.3), other conduct disorders (F91.8) and conduct disorder, unspecified (F91.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 886 (Behavioral and Developmental Disorders, relative weight 1.8678), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Unsocialized aggressive disorder ICD-10 codes
What is the ICD-10 code for Unsocialized aggressive disorder?
- F91.1 — Conduct disorder, childhood-onset type.
Is F91.1 billable?
- Yes. F91.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F91.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F91.1 as a principal diagnosis.
Is F91.1 a CC or MCC?
- No. F91.1 is neither a CC nor an MCC under MS-DRG v44.0.