F91 - Conduct disorders
ICD-10-CM Chapter 5: Mental, Behavioral and Neurodevelopmental disorders · F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98) · Top-level category · FY2027
Coding Guidance
F91 is a non-billable heading. Report one of the 6 more specific codes below.
Includes, Excludes and Coding Notes
Mutually exclusive: these conditions are never reported together with this code.
- antisocial behavior (Z72.81-)
- antisocial personality disorder (F60.2)
Not part of this code; report both codes when the patient has both conditions.
- conduct problems associated with attention-deficit hyperactivity disorder (F90.-)
- mood [affective] disorders (F30-F39)
- pervasive developmental disorders (F84.-)
- schizophrenia (F20.-)
Instructional notes from the ICD-10-CM tabular list.
- 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 adulthood
Conditions this code covers.
- disorders of psychological development
Not part of this code; report both codes when the patient has both conditions.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
More Specific Codes (6)
Related condition guides
Documentation requirements, coding pitfalls and FAQs for conditions coded with F91.
More specific codes for F91
Codes at the same level as F91
- Vascular dementiaF01
- Dementia in other diseases classified elsewhereF02
- Unspecified dementiaF03
- Amnestic disorder due to known physiological conditionF04
- Delirium due to known physiological conditionF05
- Other mental disorders due to known physiological conditionF06
- Personality and behavioral disorders due to known physiological conditionF07
- Unspecified mental disorder due to known physiological conditionF09
- Alcohol related disordersF10
- Opioid related disordersF11
- Cannabis related disordersF12
- Sedative, hypnotic, or anxiolytic related disordersF13
- Cocaine related disordersF14
- Other stimulant related disordersF15
- Hallucinogen related disordersF16
- Nicotine dependenceF17
- Inhalant related disordersF18
- Other psychoactive substance related disordersF19
- SchizophreniaF20
- Schizotypal disorderF21
- Delusional disordersF22
- Brief psychotic disorderF23
- Shared psychotic disorderF24
- Schizoaffective disordersF25
- Other psychotic disorder not due to a substance or known physiological conditionF28
- Unspecified psychosis not due to a substance or known physiological conditionF29
- Manic episodeF30
- Bipolar disorderF31
- Depressive episodeF32
- Major depressive disorder, recurrentF33
- Persistent mood [affective] disordersF34
- Unspecified mood [affective] disorderF39
- Phobic anxiety disordersF40
- Other anxiety disordersF41
- Obsessive-compulsive disorderF42
- Reaction to severe stress, and adjustment disordersF43
- Dissociative and conversion disordersF44
- Somatoform disordersF45
- Other nonpsychotic mental disordersF48
- Eating disordersF50
31 more in this chapter.