5B90.3

ICD-11 MMS 2026-01

Megavitamin-B6 syndrome

Description

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.

Index terms

  • Megavitamin-B6 syndrome

Exclusions from above levels

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

Foundation children elsewhere

  • 8D41.0 – Peripheral neuropathy due to vitamin B6 hyperalimentation

Sibling codes

  • 5B90.0 – Hypervitaminosis A
  • 5B90.1 – Hypercarotenaemia
  • 5B90.2 – Hypervitaminosis D
  • 5B90.Y – Other specified vitamin excess
  • 5B90.Z – Unspecified vitamin excesses

Foundation entity

Megavitamin-B6 syndrome – http://id.who.int/icd/entity/1186647123

Part of: 5B90: Vitamin excesses › 05: Endocrine, nutritional or metabolic diseases