4A84

ICD-11 MMS 2026-01

Anaphylaxis

Description

Anaphylaxis is a severe, life-threatening systemic hypersensitivity reaction characterised by being rapid in onset with potentially life-threatening airway, breathing, or circulatory problems and is usually, although not always, associated with skin and mucosal changes.

Exclusions from above levels

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

Child codes

  • 4A84.0 – Anaphylaxis due to allergic reaction to food
  • 4A84.1 – Drug-induced anaphylaxis
  • 4A84.2 – Anaphylaxis due to insect venom
  • 4A84.3 – Anaphylaxis provoked by physical factors
  • 4A84.4 – Anaphylaxis due to inhaled allergens
  • 4A84.5 – Anaphylaxis due to contact with allergens
  • 4A84.6 – Anaphylaxis secondary to mast cell disorder
  • 4A84.Y – Other specified anaphylaxis
  • 4A84.Z – Anaphylaxis, unspecified

Sibling codes

  • 4A80 – Allergic or hypersensitivity disorders involving the respiratory tract
  • 4A81 – Allergic or hypersensitivity disorders involving the eye
  • 4A82 – Allergic or hypersensitivity disorders involving skin or mucous membranes
  • 4A83 – Allergic or hypersensitivity disorders involving the gastrointestinal tract
  • 4A85 – Complex allergic or hypersensitivity conditions
  • 4A8Y – Allergic or hypersensitivity conditions of other specified type
  • 4A8Z – Allergic or hypersensitivity conditions of unspecified type

Foundation entity

Anaphylaxis – http://id.who.int/icd/entity/1868068711

Allowed postcoordination axes

Part of: 04: Diseases of the immune system