F91.8
BillableOther conduct disorders
HCC Category Mapping
RxHCCHCC 133 — Personality Disorders, Anxiety, and Other Specified Mental Disorders
0.000What This Code Means
Behavioral or conduct disorders that do not fit the standard categories of family-confined, childhood-onset, adolescent-onset conduct disorder, or oppositional defiant disorder.
Coding Tips
- •Use only when conduct disorder is documented but does not meet criteria for other F91 codes
- •Include detailed behavioral description in documentation to justify this classification
Clinical Significance
This code captures conduct disorders that are specifically identified but do not fit the standard subtypes (family-confined, childhood-onset, adolescent-onset, or oppositional defiant disorder). This may include conduct disorders with atypical features or presentations that cross traditional subtype boundaries. Documentation should clearly specify the nature of the conduct disturbance.
Documentation Requirements
- ✓Provider documentation of a specific conduct disorder that does not fit standard subtype categories
- ✓Evidence of persistent behavioral pattern violating societal norms or others' rights
- ✓Clinical rationale for why standard subtypes are not applicable
- ✓Documentation of functional impairment
- ✓Treatment plan addressing the conduct disturbance
Commonly Confused Codes
F91.1 — Conduct disorder, childhood-onset type; use when symptoms began before age 10F91.2 — Conduct disorder, adolescent-onset type; use when symptoms began in adolescenceF91.9 — Conduct disorder, unspecified; F91.8 is for a specific atypical presentation, while F91.9 is truly unspecifiedF91.3 — Oppositional defiant disorder; ODD has its own code and should not be coded as F91.8