5A00.21

ICD-11 MMS 2026-01

Myxoedema coma

Description

A life-threatening hypothyroid condition with long-standing severe untreated hypothyroidism in whom adaptive mechanisms fail to maintain homeostasis.

Index terms

  • Myxoedema coma
  • hypothyroid coma
  • myxoedematous coma
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  • Myxoedema coma due to subclinical hypothyroidism
  • Iatrogenic myxoedema coma
  • Myxoedema coma due to infiltrative disorders

Exclusions from above levels

  • 5A00.1 – iodine-deficiency-related hypothyroidism
  • 5D40 – Postprocedural hypothyroidism
  • 18 – Pregnancy, childbirth or the puerperium
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  • http://id.who.int/icd/entity/1004987305 – Transitory endocrine or metabolic disorders specific to fetus or newborn

Sibling codes

  • 5A00.20 – Hypothyroidism due to medicaments or other exogenous substances
  • 5A00.22 – Subclinical iodine-deficiency hypothyroidism
  • 5A00.2Y – Other specified acquired hypothyroidism
  • 5A00.2Z – Acquired hypothyroidism, unspecified

Foundation entity

Myxoedema coma – http://id.who.int/icd/entity/1878410271

Part of: 5A00.2: Acquired hypothyroidism › 5A00: Hypothyroidism › 05: Endocrine, nutritional or metabolic diseases