ICD-10-CM 2027
ICD-10 code for habit disorder
From the official ICD-10-CM alphabetic index entry “Disorder (of) › habit (and impulse)”. Page updated September 29, 2026.
About coding habit disorder
The ICD-10-CM code for habit disorder is F63.9 (Impulse disorder, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F63.9.
Within F63, choose F63.9 (Impulse disorder, unspecified) only when documentation doesn't support a more specific option: pathological gambling (F63.0), Pyromania (F63.1), Kleptomania (F63.2), Trichotillomania (F63.3) and other impulse disorders (F63.8).
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.
More specific habit disorder codes (official index)
Common questions about habit disorder ICD-10 codes
What is the ICD-10 code for habit disorder?
- F63.9 — Impulse disorder, unspecified. More specific codes apply when the documentation supports them: F65.9, F63.89.
Is F63.9 billable?
- Yes. F63.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F63.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F63.9 as a principal diagnosis.
Is F63.9 a CC or MCC?
- No. F63.9 is neither a CC nor an MCC under MS-DRG v44.0.