ICD-11 classes
04 Diseases of the immune system
Allergic or hypersensitivity conditions
4A82 — Allergic or hypersensitivity disorders involving skin or...
Urticaria, angioedema and other urticarial disorders

ICD-11 Urticaria, angioedema and other urticarial disorders

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.

The diagnosis includes nothing.

Diagnosis contains 12 clarifying diagnoses:

1. EB00 — Spontaneous urticaria
   It contains 2 clarifying diagnoses.
2. EB01 — Inducible urticaria and angioedema
   It contains 5 clarifying diagnoses.
3. EB02 — Cholinergic urticaria and related conditions
   It contains 3 clarifying diagnoses.
4. EB03 — Syndromes with urticarial reactions or angioedema
   It contains 2 clarifying diagnoses.
5. EB04 — Idiopathic angioedema
6. EB05 — Urticaria of unspecified type
7. 4A00.14 — Hereditary angioedema
8. 4A00.15 — Acquired angioedema
9. EF40.10 — Urticarial vasculitis
   It contains 1 clarifying diagnosis.
10. 4A85.21 — Food-induced urticaria or angioedema
11. EH61 — Drug-induced urticaria, angioedema and anaphylaxis
    It contains 3 clarifying diagnoses.
12. EB0Y — Other specified urticarial disorders

The diagnosis is coded elsewhere:

• Inflammatory dermatoses #15549
• Urticaria, angioedema and other urticarial disorders #15717