8A82

ICD-11 MMS 2026-01

Trigeminal autonomic cephalalgias

Description

A group of related primary headache disorders essentially characterised by unilateral headache and trigeminal autonomic activation. In most but not all of these disorders, the headache is short-lasting and very frequently recurring, but sometimes remitting for long periods.

Index terms

  • Trigeminal autonomic cephalalgias
  • Cluster headache
  • Horton headache
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  • Episodic cluster headache
  • Chronic cluster headache
  • Paroxysmal hemicrania
  • Episodic paroxysmal hemicrania
  • Chronic paroxysmal hemicrania
  • CPH - [chronic paroxysmal hemicrania]
  • Short-lasting unilateral neuralgiform headache attacks with conjunctival injection or tearing
  • SUNCT - [Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing]
  • Hemicrania continua

Exclusions from above levels

  • MB4D – Headache, not elsewhere classified
  • 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

  • 8A80 – Migraine
  • 8A81 – Tension-type headache
  • 8A83 – Other primary headache disorder
  • 8A84 – Secondary headache
  • 8A85 – Painful cranial neuropathies or other facial pains
  • 8A8Y – Other specified headache disorders
  • 8A8Z – Headache disorders, unspecified

Foundation entity

Trigeminal autonomic cephalalgias – http://id.who.int/icd/entity/607078588

Part of: 08: Diseases of the nervous system