The ICD-9 code range ORGANIC PSYCHOTIC CONDITIONS for 290-294 is medical classification list by the World Health Organization (WHO).
Dementias
Presenile dementia
Senile dementia with delusional or depressive features
Vascular dementia
Alcohol-induced mental disorders
Other specified alcohol-induced mental disorders
Drug-induced mental disorders
Drug-induced psychotic disorders
Other specified drug-induced mental disorders
Transient mental disorders due to conditions classified elsewhere
Other specified transient mental disorders due to conditions classified elsewhere
Psychotic disorder with delusions in conditions classified elsewhere
Psychotic disorder with hallucinations in conditions classified elsewhere
Mood disorder in conditions classified elsewhere
Anxiety disorder in conditions classified elsewhere
Other specified transient mental disorders due to conditions classified elsewhere, other
Persistent mental disorders due to conditions classified elsewhere
Dementia in conditions classified elsewhere
Dementia, unspecified