6E65

ICD-11 MMS 2026-01

Secondary dissociative syndrome

Description

A syndrome characterised by the presence of prominent dissociative symptoms (e.g., depersonalization, derealization) that is judged to be the direct pathophysiological consequence of a health condition not classified under mental and behavioural disorders, based on evidence from the history, physical examination, or laboratory findings. The symptoms are not accounted for by delirium or by another mental and behavioural disorder, and are not a psychologically mediated response to a severe medical condition (e.g., as part of an acute stress reaction in response to a life-threatening diagnosis). This category should be used in addition to the diagnosis for the presumed underlying disorder or disease when the dissociative symptoms are sufficiently severe to warrant specific clinical attention.

Index terms

  • Secondary dissociative syndrome
  • Organic dissociative disorder
  • Dissociative syndrome due to health condition not classified under mental and behavioural disorders

Excludes

  • 6D70 – Delirium
  • QE84 – Acute stress reaction

Exclusions from above levels

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

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
  • 6E66 – Secondary impulse control syndrome
  • 6E67 – Secondary neurocognitive 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 dissociative syndrome – http://id.who.int/icd/entity/440469874

Allowed postcoordination axes

Part of: 06: Mental, behavioural or neurodevelopmental disorders