5B5C

ICD-11 MMS 2026-01

Vitamin B3 deficiency

Description

Niacin deficiency classically results in pellagra, which is a chronic wasting disease associated with a characteristic erythematous dermatitis that is bilateral and symmetrical, a dementia after mental changes including insomnia and apathy preceding an overt encephalopathy, and diarrhoea resulting from inflammation of the intestinal mucous surfaces. Pellagra occurs endemically in poorer areas of Africa, China and India.

Inclusions

  • niacin deficiency NOS

Exclusions from above levels

Show allHide
  • 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

  • 5B5C.0 – Pellagra
  • 5B5C.Y – Other specified vitamin B3 deficiency
  • 5B5C.Z – Vitamin B3 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
  • 5B5A – Vitamin B1 deficiency
  • 5B5B – Vitamin B2 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 B3 deficiency – http://id.who.int/icd/entity/135549215

Part of: 05: Endocrine, nutritional or metabolic diseases