5A03.1

ICD-11 MMS 2026-01

Subacute thyroiditis

Description

A self-limited thyroiditis associated with a triphasic clinical course of hyperthyroidism, hypothyroidism, and return to normal thyroid function. It is thought to be caused by a viral infection.

Index terms

  • Subacute thyroiditis
  • de Quervain thyroiditis
  • giant-cell thyroiditis
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  • granulomatous thyroiditis
  • nonsuppurative subacute thyroiditis
  • nonsuppurative thyroiditis NOS
  • pseudogranulomatous thyroiditis
  • pseudotuberculous thyroiditis
  • subacute granulomatous thyroiditis

Inclusions

  • de Quervain thyroiditis
  • giant-cell thyroiditis
  • granulomatous thyroiditis

Excludes

  • 5A03.2 – Autoimmune thyroiditis

Exclusions from above levels

  • 5A00.2 – Acquired hypothyroidism
  • 5A02 – Thyrotoxicosis
  • 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

  • 5A03.0 – Acute thyroiditis
  • 5A03.2 – Autoimmune thyroiditis
  • 5A03.Y – Other specified thyroiditis
  • 5A03.Z – Thyroiditis, unspecified

Foundation entity

Subacute thyroiditis – http://id.who.int/icd/entity/1320394379

Part of: 5A03: Thyroiditis › 05: Endocrine, nutritional or metabolic diseases