E06.3 Autoimmune thyroiditis

Billable ICD-10-CM code, FY2026.

Applicable to

• Hashimoto's thyroiditis
• Hashitoxicosis (transient)
• Lymphadenoid goiter
• Lymphocytic thyroiditis
• Struma lymphomatosa

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)

• 245.2 Chronic lymphocytic thyroiditis

Code annotations containing back-references to E06.3

Back-references to E06.3

• Type 1 Excludes: E06.1 Subacute thyroiditis ("autoimmune thyroiditis (E06.3)")
• Type 1 Excludes: E06.2 Chronic thyroiditis with transient thyrotoxicosis ("autoimmune thyroiditis (E06.3)")
• Code Also: H05.83 Thyroid orbitopathy ("autoimmune thyroiditis (E06.3)")

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 E06.3

• Autoimmune › thyroiditis
• Disease, diseased › autoimmune (systemic) NOS › thyroid
• Disease, diseased › Hashimoto's (struma lymphomatosa)
• Goiter (plunging) (substernal) › lymphadenoid
• Hashimoto's disease or thyroiditis
• Hashitoxicosis (transient)
• Lymphadenoid goiter
• Struma › Hashimoto
• Struma › lymphomatosa
• Thyroiditis › autoimmune
• Thyroiditis › chronic (nonspecific) (sclerosing) › lymphadenoid
• Thyroiditis › chronic (nonspecific) (sclerosing) › lymphocytic
• Thyroiditis › chronic (nonspecific) (sclerosing) › lymphoid
• Thyroiditis › Hashimoto's (struma lymphomatosa)
• Thyroiditis › lymphocytic (chronic)
• Thyroiditis › lymphoid
• Thyroiditis › lymphomatous

Nearby codes

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