6C4E.1

ICD-11 MMS 2026-01

Harmful pattern of use of other specified psychoactive substance

Description

A pattern of use of a specified psychoactive substance or medication that is not included in the other substance classes specifically identified under Disorders Due to Substance Use 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 intoxication due to the specified substance or medication on the part of the person to whom the diagnosis of Harmful pattern of use of other specified psychoactive substance applies.

Excludes

  • 6C4E.0 – Episode of harmful use of other specified psychoactive substance
  • 6C4E.2 – Other specified psychoactive substance dependence

Exclusions from above levels

  • 6D72.12 – Amnestic disorder due to other specified psychoactive substance including medications
  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Child codes

  • 6C4E.10 – Harmful pattern of use of other specified psychoactive substance, episodic
  • 6C4E.11 – Harmful pattern of use of other specified psychoactive substance, continuous
  • 6C4E.1Z – Harmful pattern of use of other specified psychoactive substance, unspecified

Sibling codes

  • 6C4E.0 – Episode of harmful use of other specified psychoactive substance
  • 6C4E.2 – Other specified psychoactive substance dependence
  • 6C4E.3 – Other specified psychoactive substance intoxication
  • 6C4E.4 – Other specified psychoactive substance withdrawal
  • 6C4E.5 – Delirium induced by other specified psychoactive substance including medications
  • 6C4E.6 – Psychotic disorder induced by other specified psychoactive substance
  • 6C4E.7 – Certain other specified psychoactive substance-induced mental or behavioural disorders
  • 6C4E.Y – Other specified disorders due to use of other specified psychoactive substances, including medications
  • 6C4E.Z – Disorders due to use of other specified psychoactive substances, including medications, unspecified

Foundation entity

Harmful pattern of use of other specified psychoactive substance – http://id.who.int/icd/entity/754209924

Allowed postcoordination axes

Part of: 6C4E: Disorders due to use of other specified psychoactive substances, including medications › 06: Mental, behavioural or neurodevelopmental disorders