3A21.1

ICD-11 MMS 2026-01

Microangiopathic haemolytic anaemia

Description

This is a microangiopathic subgroup of haemolytic anaemia (loss of red blood cells through destruction) caused by factors in the small blood vessels. It is identified by the finding of anaemia and schistocytes on microscopy of the blood film.

Index terms

  • Microangiopathic haemolytic anaemia
  • Neoplastic microangiopathic haemolytic anaemia

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

Sibling codes

  • 3A21.0 – Paroxysmal nocturnal haemoglobinuria
  • 3A21.2 – Haemolytic uraemic syndrome
  • 3A21.Y – Other specified acquired haemolytic anaemia, non-immune
  • 3A21.Z – Acquired haemolytic anaemia, non-immune, unspecified

Foundation entity

Microangiopathic haemolytic anaemia – http://id.who.int/icd/entity/1323666680

Part of: 3A21: Acquired haemolytic anaemia, non-immune › 03: Diseases of the blood or blood-forming organs