AB30

ICD-11 MMS 2026-01

Acute vestibular syndrome

Description

A clinical syndrome of acute-onset, continuous vertigo, dizziness, or unsteadiness lasting days to weeks, and generally including features suggestive of new, ongoing vestibular system dysfunction (e.g., vomiting, nystagmus, severe postural instability). There may also be symptoms or signs suggesting cochlear or central nervous system dysfunction. Acute vestibular syndrome usually connotes a single, monophasic event, often caused by a one-time disorder, but it may instead punctuate a relapsing-and-remitting or stepwise, progressive illness course. Disorders typically presenting this syndrome include vestibular neuritis, acute labyrinthitis, traumatic vestibulopathy, demyelinating disease with vestibular involvement, and strokes affecting central or peripheral vestibular structures.

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

  • AB30.0 – Vestibular neuritis
  • AB30.1 – Labyrinthitis
  • AB30.Y – Other specified acute vestibular syndrome
  • AB30.Z – Acute vestibular syndrome, unspecified

Sibling codes

  • AB31 – Episodic 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

Acute vestibular syndrome – http://id.who.int/icd/entity/1462112221

Allowed postcoordination axes

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