05Endocrine, nutritional or metabolic diseases
Nutritional disorders
Overweight, obesity or specific nutrient excesses
Certain specified nutrient excesses
5B90Vitamin excesses
5B90.3
category
Megavitamin-B6 syndrome
Definition A disease caused by an excess of vitamin B6. This disease is characterised by progressive sensory ataxia, diminished or absent tendon reflexes, and impaired sense of touch, temperature and pain. Confirmation is by blood test.
Also indexed as
Megavitamin-B6 syndrome
Nearby in Vitamin excesses
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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