6C4G.10

ICD-11 MMS 2026-01

Harmful pattern of use of unknown or unspecified psychoactive substance, episodic

Description

A pattern of episodic or intermittent 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 episodic substance use is evident over a period of at least 12 months. 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.

Index terms

  • Harmful pattern of use of unknown or unspecified psychoactive substance, episodic

Excludes

  • 6C4G.0 – Episode of harmful use of unknown or unspecified psychoactive substances
  • 6C4G.2 – Unknown or unspecified psychoactive substance dependence

Exclusions from above levels

  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Sibling codes

  • 6C4G.11 – Harmful pattern of use of unknown or unspecified psychoactive substance, continuous
  • 6C4G.1Z – Harmful pattern of use of unknown or unspecified psychoactive substance, unspecified

Foundation entity

Harmful pattern of use of unknown or unspecified psychoactive substance, episodic – http://id.who.int/icd/entity/74269862

Allowed postcoordination axes

Part of: 6C4G.1: Harmful pattern of use of unknown or unspecified psychoactive substance › 6C4G: Disorders due to use of unknown or unspecified psychoactive substances › 06: Mental, behavioural or neurodevelopmental disorders