6E67

ICD-11 MMS 2026-01

Secondary neurocognitive syndrome

Description

A syndrome that involves significant cognitive features that do not fulfill the diagnostic requirements of any of the specific neurocognitive disorders and are judged to be a direct pathophysiological consequence of a health condition or injury not classified under mental and behavioural disorders (e.g., cognitive changes due to a brain tumour), based on evidence from the history, physical examination, or laboratory findings. This category should be used in addition to the diagnosis for the presumed underlying disorder or disease when the cognitive symptoms are sufficiently severe to warrant specific clinical attention.

Index terms

  • Secondary neurocognitive syndrome
  • Neurocognitive syndrome due to health condition not classified under mental and behavioural disorders

Excludes

  • http://id.who.int/icd/entity/1719545571 – Disorders with neurocognitive impairment as a major feature

Exclusions from above levels

  • 6C20 – Bodily distress disorder
  • MG30 – Chronic pain
  • MG31 – Acute pain
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  • QE62 – Uncomplicated bereavement
  • QE84 – Acute stress reaction

Foundation children elsewhere

Sibling codes

  • 6E60 – Secondary neurodevelopmental syndrome
  • 6E61 – Secondary psychotic syndrome
  • 6E62 – Secondary mood syndrome
  • 6E63 – Secondary anxiety syndrome
  • 6E64 – Secondary obsessive-compulsive or related syndrome
  • 6E65 – Secondary dissociative syndrome
  • 6E66 – Secondary impulse control syndrome
  • 6E68 – Secondary personality change
  • 6E69 – Secondary catatonia syndrome
  • 6E6Y – Other specified secondary mental or behavioural syndrome
  • 6E6Z – Secondary mental or behavioural syndrome, unspecified

Foundation entity

Secondary neurocognitive syndrome – http://id.who.int/icd/entity/235421675

Allowed postcoordination axes

Part of: 06: Mental, behavioural or neurodevelopmental disorders