3A20

ICD-11 MMS 2026-01

Acquired haemolytic anaemia, immune

Description

A condition characterised by antibodies that are directed against red blood cells in an autoimmune reaction leading to low levels of red blood cells. This condition may present with pallor, fatigue, shortness of breath. Confirmation is by identification of antibodies in a blood sample and positive Coombs test result.

Exclusions from above levels

  • 04 – Diseases of the immune system
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth or the puerperium
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  • 19 – Certain conditions originating in the perinatal period
  • 20 – Congenital malformations, deformations or chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes
  • http://id.who.int/icd/entity/1000704511 – Human immunodeficiency virus disease
  • JB64.1 – Other diseases of the blood or blood-forming organs or certain disorders involving the immune mechanism complicating pregnancy, childbirth or the puerperium

Child codes

  • 3A20.0 – Autoimmune haemolytic anaemia, warm type
  • 3A20.1 – Autoimmune haemolytic anaemia, cold type
  • 3A20.2 – Autoimmune haemolytic anaemia, mixed type, cold and warm
  • 3A20.3 – Paroxysmal cold haemoglobinuria
  • 3A20.4 – Alloimmune haemolytic anaemia
  • 3A20.5 – Evans syndrome
  • 3A20.Y – Other specified acquired haemolytic anaemia, immune
  • 3A20.Z – Acquired haemolytic anaemia, immune, unspecified

Sibling codes

  • 3A21 – Acquired haemolytic anaemia, non-immune
  • 3A2Z – Acquired haemolytic anaemia, unspecified

Foundation entity

Acquired haemolytic anaemia, immune – http://id.who.int/icd/entity/1834341306

Allowed postcoordination axes

Part of: 03: Diseases of the blood or blood-forming organs