ICD-11 classes
14 Diseases of the skin
Metabolic and nutritional disorders affecting the skin
Disorders of vitamins or their metabolism which may affect...
5B5C — Vitamin B3 deficiency
ICD-11 5B5C — Vitamin B3 deficiency
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.
It includes 1 item.
- Niacin deficiency NOS
The diagnosis excludes nothing.
Diagnosis with code 5B5C contains 2 clarifying diagnoses:
- 5B5C.0 — Pellagra
- 5B5C.Y — Other specified vitamin B3 deficiency
The diagnosis is coded elsewhere:
- Undernutrition #4493
- Vitamin B3 deficiency #4540