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Urticaria, angioedema and other urticarial disorders

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

A heterogeneous group of disorders characterised by dermal and/or subcutaneous and submucosal oedema. The most common underlying mechanism is release of histamine from mast cells with consequent capillary dilatation and tissue oedema. This is responsible for the weals of spontaneous and most physical urticarias. A variety of other mechanisms are involved in other urticarial disorders.

exclusions

• Urticaria pigmentosa  (2A21.10)
• Papular urticaria  (EK50.00)

code elsewhere

• Hereditary angioedema  (4A00.14)
• Acquired angioedema  (4A00.15)
• Urticarial vasculitis  (EF40.10)
• Food-induced urticaria or angioedema  (4A85.21)
• Drug-induced urticaria, angioedema and anaphylaxis  (EH61)
• Angioedema due to disordered complement activation or kinin metabolism  (4A00.1Z)

sections/codes in this section (EB00-EB0Y)

• Spontaneous urticaria  (EB00)
• Inducible urticaria and angioedema  (EB01)
• Cholinergic urticaria and related conditions  (EB02)
• Syndromes with urticarial reactions or angioedema  (EB03)
• Idiopathic angioedema  (EB04)
• Urticaria of unspecified type  (EB05)
• Other specified urticarial disorders  (EB0Y)

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