AB31

ICD-11 MMS 2026-01

Episodic vestibular syndrome

Description

A clinical syndrome of transient vertigo, dizziness, or unsteadiness lasting seconds to hours, occasionally days, and generally including features suggestive of temporary, short-lived vestibular system dysfunction (e.g., nausea, nystagmus, sudden falls). There may also be symptoms or signs suggesting cochlear or central nervous system dysfunction. Episodic vestibular syndrome usually connotes multiple, recurrent events caused by an episodic disorder with repeated spells (triggered or spontaneous), but may initially present after the first event.

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 02 – Neoplasms
  • 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

Child codes

  • AB31.0 – Meniere disease
  • AB31.1 – Vestibular migraine
  • AB31.2 – Benign positional paroxysmal vertigo
  • AB31.3 – Superior canal dehiscence syndrome
  • AB31.4 – Disembarkment syndrome
  • AB31.5 – Autoimmune inner ear disease
  • AB31.6 – Vestibular paroxysmia
  • AB31.7 – Vertiginous syndromes
  • AB31.Y – Other specified episodic vestibular syndrome
  • AB31.Z – Episodic vestibular syndrome, unspecified

Sibling codes

  • AB30 – Acute vestibular syndrome
  • AB32 – Chronic vestibular syndrome
  • AB33 – Otosclerosis
  • AB34 – Disorders of vestibular function
  • AB35 – Labyrinthine fistula
  • AB36 – Labyrinthine dysfunction
  • AB37 – Noise effects on inner ear
  • AB3Y – Other specified diseases of inner ear
  • AB3Z – Diseases of inner ear, unspecified

Foundation entity

Episodic vestibular syndrome – http://id.who.int/icd/entity/1402706403

Allowed postcoordination axes

Part of: 10: Diseases of the ear or mastoid process