4A44.2

ICD-11 MMS 2026-01

Giant cell arteritis

Description

Arteritis, often granulomatous, usually affecting the aorta and/or its major branches, with a predilection for the branches of the carotid artery. Often involves the temporal artery. Onset usually in patients older than 50 and often associated with polymyalgia rheumatica.

Index terms

  • Giant cell arteritis
  • GCA - [giant cell arteritis]
  • Horton disease
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  • cranial arteritis
  • temporal arteritis
  • Giant cell arteritis with polymyalgia rheumatica
  • Giant cell arteritis without polymyalgia rheumatica

Exclusions from above levels

  • 02 – Neoplasms
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 20 – Developmental anomalies

Sibling codes

  • 4A44.0 – Rhizomelic pseudopolyarthritis
  • 4A44.1 – Aortic arch syndrome
  • 4A44.3 – Single organ vasculitis
  • 4A44.4 – Polyarteritis nodosa
  • 4A44.5 – Mucocutaneous lymph node syndrome
  • 4A44.6 – Sneddon syndrome
  • 4A44.7 – Primary angiitis of the central nervous system
  • 4A44.8 – Thromboangiitis obliterans
  • 4A44.9 – Immune complex small vessel vasculitis
  • 4A44.A – Antineutrophil cytoplasmic antibody-associated vasculitis
  • 4A44.B – Leukocytoclastic vasculitis
  • 4A44.Y – Other specified vasculitis
  • 4A44.Z – Vasculitis, unspecified

Foundation entity

Giant cell arteritis – http://id.who.int/icd/entity/1929970386

Allowed postcoordination axes

Part of: 4A44: Vasculitis › 04: Diseases of the immune system