6C49.1

ICD-11 MMS 2026-01

Harmful pattern of use of hallucinogens

Description

A pattern of use of hallucinogens 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 hallucinogen use is evident over a period of at least 12 months if substance 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 hallucinogen intoxication on the part of the person to whom the diagnosis of Harmful pattern of use of hallucinogens applies.

Excludes

  • 6C49.0 – Episode of harmful use of hallucinogens
  • 6C49.2 – Hallucinogen dependence

Exclusions from above levels

  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Child codes

  • 6C49.10 – Harmful pattern of use of hallucinogens, episodic
  • 6C49.11 – Harmful pattern of use of hallucinogens, continuous
  • 6C49.1Z – Harmful pattern of use of hallucinogens, unspecified

Sibling codes

  • 6C49.0 – Episode of harmful use of hallucinogens
  • 6C49.2 – Hallucinogen dependence
  • 6C49.3 – Hallucinogen intoxication
  • 6C49.4 – Hallucinogen-induced delirium
  • 6C49.5 – Hallucinogen-induced psychotic disorder
  • 6C49.6 – Certain specified hallucinogen-induced mental or behavioural disorders
  • 6C49.Y – Other specified disorders due to use of hallucinogens
  • 6C49.Z – Disorders due to use of hallucinogens, unspecified

Foundation entity

Harmful pattern of use of hallucinogens – http://id.who.int/icd/entity/219736364

Allowed postcoordination axes

Part of: 6C49: Disorders due to use of hallucinogens › 06: Mental, behavioural or neurodevelopmental disorders