6C41.1

ICD-11 MMS 2026-01

Harmful pattern of use of cannabis

Description

A pattern of cannabis 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 cannabis 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 cannabis intoxication on the part of the person to whom the diagnosis of Harmful pattern of use of cannabis applies.

Excludes

  • 6C41.0 – Episode of harmful use of cannabis
  • 6C41.2 – Cannabis dependence

Exclusions from above levels

  • 6C42 – Disorders due to use of synthetic cannabinoids
  • QE11.1 – Hazardous use of cannabis
  • QE62 – Uncomplicated bereavement
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  • QE84 – Acute stress reaction

Child codes

  • 6C41.10 – Harmful pattern of use of cannabis, episodic
  • 6C41.11 – Harmful pattern of use of cannabis, continuous
  • 6C41.1Z – Harmful pattern of use of cannabis, unspecified

Sibling codes

  • 6C41.0 – Episode of harmful use of cannabis
  • 6C41.2 – Cannabis dependence
  • 6C41.3 – Cannabis intoxication
  • 6C41.4 – Cannabis withdrawal
  • 6C41.5 – Cannabis-induced delirium
  • 6C41.6 – Cannabis-induced psychotic disorder
  • 6C41.7 – Certain specified cannabis-induced mental or behavioural disorders
  • 6C41.Y – Other specified disorders due to use of cannabis
  • 6C41.Z – Disorders due to use of cannabis, unspecified

Foundation entity

Harmful pattern of use of cannabis – http://id.who.int/icd/entity/937834582

Allowed postcoordination axes

Part of: 6C41: Disorders due to use of cannabis › 06: Mental, behavioural or neurodevelopmental disorders