AB32

ICD-11 MMS 2026-01

Chronic vestibular syndrome

Description

A clinical syndrome of chronic vertigo, dizziness, or unsteadiness lasting months to years and generally including features suggestive of persistent vestibular system dysfunction (e.g., oscillopsia, nystagmus, gait unsteadiness). There may also be symptoms or signs suggesting cochlear or central nervous system dysfunction. Chronic vestibular syndrome often connotes a progressive, deteriorating course, but sometimes instead reflects a stable, incomplete recovery after an acute vestibular event, or persistent, lingering symptoms between episodic vestibular events.

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

  • AB32.0 – Persistent Postural-Perceptual Dizziness
  • AB32.1 – Chronic unilateral idiopathic vestibulopathy
  • AB32.2 – Persistent unilateral vestibulopathy after vestibular neuronitis
  • AB32.3 – Unilateral vestibulopathy due to schwannoma
  • AB32.4 – Unilateral vestibulopathy after medical intervention
  • AB32.5 – Chronic bilateral vestibulopathy
  • AB32.Y – Other specified chronic vestibular syndrome
  • AB32.Z – Chronic vestibular syndrome, unspecified

Sibling codes

  • AB30 – Acute vestibular syndrome
  • AB31 – Episodic 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

Chronic vestibular syndrome – http://id.who.int/icd/entity/579898286

Allowed postcoordination axes

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