6C43.5

ICD-11 MMS 2026-01

Opioid-induced delirium

Description

Opioid-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 withdrawal or during the use of opioids. The amount and duration of opioid 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

  • Opioid-induced delirium
  • Delirium induced by opioid withdrawal
  • Delirium induced by opioid withdrawal, with seizures
Show allHide
  • Delirium induced by opioid withdrawal, without seizures

Inclusions

  • Delirium induced by opioid withdrawal

Exclusions from above levels

  • QE11.0 – Hazardous use of opioids
  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Sibling codes

  • 6C43.0 – Episode of harmful use of opioids
  • 6C43.1 – Harmful pattern of use of opioids
  • 6C43.2 – Opioid dependence
  • 6C43.3 – Opioid intoxication
  • 6C43.4 – Opioid withdrawal
  • 6C43.6 – Opioid-induced psychotic disorder
  • 6C43.7 – Certain specified opioid-induced mental or behavioural disorders
  • 6C43.Y – Other specified disorders due to use of opioids
  • 6C43.Z – Disorders due to use of opioids, unspecified

Foundation entity

Opioid-induced delirium – http://id.who.int/icd/entity/1416205973

Allowed postcoordination axes

Part of: 6C43: Disorders due to use of opioids › 06: Mental, behavioural or neurodevelopmental disorders