5B5A

ICD-11 MMS 2026-01

Vitamin B1 deficiency

Description

Vitamin B1 deficiency manifests itself principally with changes involving the nervous system (polyneuritis and paralysis of the peripheral nerves), the cardiovascular system (cardiac insufficiency and generalised oedema), and also the gastrointestinal tract (constipation, vomiting, and abdominal pain).

Exclusions from above levels

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  • NF07.0 – starvation
  • 18 – Pregnancy, childbirth or the puerperium
  • http://id.who.int/icd/entity/1004987305 – Transitory endocrine or metabolic disorders specific to fetus or newborn

Child codes

  • 5B5A.0 – Beriberi
  • 5B5A.1 – Wernicke-Korsakoff Syndrome
  • 5B5A.Y – Other specified vitamin B1 deficiency
  • 5B5A.Z – Vitamin B1 deficiency, unspecified

Sibling codes

  • 5B50 – Underweight in infants, children or adolescents
  • 5B51 – Wasting in infants, children or adolescents
  • 5B52 – Acute malnutrition in infants, children or adolescents
  • 5B53 – Stunting in infants, children or adolescents
  • 5B54 – Underweight in adults
  • 5B55 – Vitamin A deficiency
  • 5B56 – Vitamin C deficiency
  • 5B57 – Vitamin D deficiency
  • 5B58 – Vitamin E deficiency
  • 5B59 – Vitamin K deficiency
  • 5B5B – Vitamin B2 deficiency
  • 5B5C – Vitamin B3 deficiency
  • 5B5D – Vitamin B6 deficiency
  • 5B5E – Folate deficiency
  • 5B5F – Vitamin B12 deficiency
  • 5B5G – Biotin deficiency
  • 5B5H – Pantothenic acid deficiency
  • 5B5J – Choline deficiency
  • 5B5K – Mineral deficiencies
  • 5B70 – Essential fatty acid deficiency
  • 5B71 – Protein deficiency
  • 5B7Y – Other specified undernutrition
  • 5B7Z – Unspecified undernutrition

Foundation entity

Vitamin B1 deficiency – http://id.who.int/icd/entity/2092499426

Allowed postcoordination axes

Part of: 05: Endocrine, nutritional or metabolic diseases