E06.1 Subacute thyroiditis

Billable ICD-10-CM code, FY2026.

Applicable to

• de Quervain thyroiditis
• Giant-cell thyroiditis
• Granulomatous thyroiditis
• Nonsuppurative thyroiditis
• Viral thyroiditis

Excludes1 (never code together)

• autoimmune thyroiditis (E06.3)

Applies from E06 Thyroiditis

Excludes1 (never code together)

• postpartum thyroiditis (O90.5)

Risk adjustment (HCC)

• RxHCC V08: HCC 44 — Thyroid Disorders

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 245.1 Subacute thyroiditis

Code annotations containing back-references to E06.1

Back-references to E06

• Code First: G63 Polyneuropathy in diseases classified elsewhere ("endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)")

Diagnosis Index entries for E06.1

• De Quervain's › thyroiditis (subacute granulomatous thyroiditis)
• Disease, diseased › de Quervain's (tendon sheath) › thyroid (subacute granulomatous thyroiditis)
• Quervain's disease › thyroid
• Thyroiditis › de Quervain's
• Thyroiditis › giant-cell (follicular)
• Thyroiditis › granulomatous (de Quervain) (subacute)
• Thyroiditis › nonsuppurative
• Thyroiditis › pseudotuberculous
• Thyroiditis › subacute (granulomatous)
• Thyroiditis › viral

Nearby codes

• E06 Thyroiditis
• E06.0 Acute thyroiditis
• E06.1 Subacute thyroiditis (this code)
• E06.2 Chronic thyroiditis with transient thyrotoxicosis
• E06.3 Autoimmune thyroiditis
• E06.4 Drug-induced thyroiditis
• E06.5 Other chronic thyroiditis
• E06.9 Thyroiditis, unspecified