8A04.4

ICD-11 MMS 2026-01

Functional tremor

Description

Functional movement disorder presenting predominantly with tremor. The tremor might be variable in frequency and distractible on testing, either entraining or ceasing in response to contralateral externally cued rhythmical movements provided by the examiner. Functional tremor is that in which no cause has been identified after investigation.

Index terms

  • Functional tremor
  • Psychogenic tremor

Exclusions from above levels

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

Sibling codes

  • 8A04.0 – Enhanced physiological tremor
  • 8A04.1 – Essential tremor or related tremors
  • 8A04.2 – Rest tremor
  • 8A04.3 – Secondary tremor
  • 8A04.Y – Other specified disorders associated with tremor
  • 8A04.Z – Disorders associated with tremor, unspecified

Foundation entity

Functional tremor – http://id.who.int/icd/entity/288547754

Allowed postcoordination axes

Part of: 8A04: Disorders associated with tremor › 08: Diseases of the nervous system