6C49.4

ICD-11 MMS 2026-01

Hallucinogen-induced delirium

Description

Hallucinogen-induced delirium is characterised by an acute state of disturbed attention and awareness with specific features of delirium that develops during or soon after substance intoxication or during the use of hallucinogens. The amount and duration of hallucinogen use must be capable of producing delirium. The symptoms are not better explained by a primary mental disorder, by use of or withdrawal from a different substance, or by another health condition that is not classified under Mental, behavioural and neurodevelopmental disorders.

Index terms

  • Hallucinogen-induced delirium
  • Mental and behavioural disorders due to use of hallucinogens withdrawal state with delirium
  • psychotic disorder due to hallucinogens withdrawal

Exclusions from above levels

  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Sibling codes

  • 6C49.0 – Episode of harmful use of hallucinogens
  • 6C49.1 – Harmful pattern of use of hallucinogens
  • 6C49.2 – Hallucinogen dependence
  • 6C49.3 – Hallucinogen intoxication
  • 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

Hallucinogen-induced delirium – http://id.who.int/icd/entity/1863378901

Allowed postcoordination axes

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