3A01.2

ICD-11 MMS 2026-01

Vitamin B12 deficiency anaemia due to low intake

Description

A disease caused by insufficient intake of vitamin B12 into the body. This disease is characterised by low levels of vitamin B12 leading to low levels of red blood cells. This disease may present with pallor, fatigue, or shortness of breath. Confirmation is by identification of low levels of vitamin B12 and red blood cell count in a blood sample.

Index terms

  • Vitamin B12 deficiency anaemia due to low intake
  • Dietary vitamin B12 deficiency anaemia
  • Megaloblastic anaemia due to vitamin B12 deficiency due to low intake
Show allHide
  • Vegan anaemia due to Vitamin B12 deficiency
  • vegan anaemia NOS

Exclusions from above levels

  • 04 – Diseases of the immune system
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth or the puerperium
Show allHide
  • 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

  • 3A01.0 – Hereditary vitamin B12 deficiency anaemia
  • 3A01.1 – Neonatal vitamin B12 deficiency anaemia
  • 3A01.3 – Vitamin B12 deficiency anaemia due to intrinsic factor deficiency
  • 3A01.4 – Vitamin B12 deficiency anaemia due to intestinal disease
  • 3A01.5 – Drug-induced vitamin B12 deficiency anaemia
  • 3A01.Y – Other specified megaloblastic anaemia due to vitamin B12 deficiency
  • 3A01.Z – Megaloblastic anaemia due to vitamin B12 deficiency, unspecified

Foundation entity

Vitamin B12 deficiency anaemia due to low intake – http://id.who.int/icd/entity/1213151459

Part of: 3A01: Megaloblastic anaemia due to vitamin B12 deficiency › 03: Diseases of the blood or blood-forming organs