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F91.1

Conduct disorder, childhood-onset type

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 7 never code together
F91code
Excludes1
  • antisocial behavior (Z72.81-)Z72.81-
  • antisocial personality disorder (F60.2)F60.2
Excludes2
  • conduct problems associated with attention-deficit hyperactivity disorder (F90.-)F90.-
  • mood [affective] disorders (F30-F39)F30-F39
  • pervasive developmental disorders (F84.-)F84.-
  • schizophrenia (F20.-)F20.-
F01-F99chapter
Excludes2
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)R00-R99

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 5
F91.1code
Inclusion terms
  • Unsocialized conduct disorder
  • Conduct disorder, solitary aggressive type
  • Unsocialized aggressive disorder
F90-F98block
Notes
  • Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthoodF90-F98
F01-F99chapter
Includes
  • disorders of psychological development
Index entries leading here 2
  • Disorder (of) — see also Disease
    • aggressive, unsocialized F91.1
    • conduct (childhood) F91.9
      • childhood onset type F91.1
      • solitary aggressive type F91.1
      • unsocialized (aggressive) F91.1
    • unsocialized aggressive F91.1
  • Disturbance (s) — see also Disease
Alongside this code 5 same parent — F91
F91.0 Conduct disorder confined to family context F91.2 Conduct disorder, adolescent-onset type F91.3 Oppositional defiant disorder F91.8 Other conduct disorders F91.9 Conduct disorder, unspecified
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

RX08HCC133

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
F91
Block
F90-F98
Siblings
5

Present FY2024–FY2027.