6C4G.1ICD-11 MMS 2026-01
Harmful pattern of use of unknown or unspecified psychoactive substance
Description
A pattern of use of an unknown or unspecified psychoactive substance that has caused damage to a person’s physical or mental health or has resulted in behaviour leading to harm to the health of others. The pattern of substance use is evident over a period of at least 12 months if use is episodic or at least one month if use is continuous (i.e., daily or almost daily). Harm to health of the individual occurs due to one or more of the following: (1) behaviour related to intoxication; (2) direct or secondary toxic effects on body organs and systems; or (3) a harmful route of administration. Harm to health of others includes any form of physical harm, including trauma, or mental disorder that is directly attributable to behaviour related to substance intoxication on the part of the person to whom the diagnosis of Harmful pattern of use of unknown or unspecified psychoactive substance applies.
Excludes
Exclusions from above levels
Child codes
Sibling codes
6C4G.0– Episode of harmful use of unknown or unspecified psychoactive substances6C4G.2– Unknown or unspecified psychoactive substance dependence6C4G.3– Intoxication due to unknown or unspecified psychoactive substance6C4G.4– Withdrawal due to unknown or unspecified psychoactive substance6C4G.5– Delirium induced by unknown or unspecified psychoactive substance6C4G.6– Psychotic disorder induced by unknown or unspecified psychoactive substance6C4G.7– Certain unknown or unspecified psychoactive substance-induced mental or behavioural disorders6C4G.Y– Other specified disorders due to use of unknown or unspecified psychoactive substances6C4G.Z– Disorders due to use of unknown or unspecified psychoactive substances, unspecified
Foundation entity
Harmful pattern of use of unknown or unspecified psychoactive substance – http://id.who.int/icd/entity/341458101
Allowed postcoordination axes
Part of: 6C4G: Disorders due to use of unknown or unspecified psychoactive substances › 06: Mental, behavioural or neurodevelopmental disorders