8A02.3

ICD-11 MMS 2026-01

Functional dystonia or spasms

Description

Functional movement disorder presenting predominantly with mobile or fixed dystonic posturing which is incongruous with other causes of dystonia and may be responsive to placebo therapy or psychotherapy. Typically a clenched fist, inverted ankle or orbicularis oculis/platysma contraction with onset as a teenager or adult. Functional dystonia or spasms where no cause has been identified after investigation.

Index terms

  • Functional dystonia or spasms

Exclusions from above levels

  • 8D21 – athetoid cerebral palsy
  • 6A06 – Stereotyped movement disorder
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • 8A02.0 – Primary dystonia
  • 8A02.1 – Secondary dystonia
  • 8A02.2 – Paroxysmal dystonia
  • 8A02.Y – Other specified dystonic disorders
  • 8A02.Z – Dystonic disorders, unspecified

Foundation entity

Functional dystonia or spasms – http://id.who.int/icd/entity/629477838

Allowed postcoordination axes

Part of: 8A02: Dystonic disorders › 08: Diseases of the nervous system