Thyroiditis (E06) ICD-10-CM
The E06 code range covers thyroiditis with 8 ICD-10-CM diagnosis codes. 7 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- postpartum thyroiditis O90.5
Codes in the E06 Range 8 codes · 7 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the E06 range.
Acute Thyroiditis
Acute inflammation of the thyroid gland.
Chronic Thyroiditis with Transient Thyrotoxicosis
Persistent and long-standing thyroiditis associated with temporary elevations of thyroid hormones.
Thyroiditis
Inflammatory diseases of the THYROID GLAND. Thyroiditis can be classified into acute (THYROIDITIS, SUPPURATIVE), subacute (granulomatous and lymphocytic), chronic fibrous (Riedel's), chronic lymphocytic (HASHIMOTO DISEASE), transient (POSTPARTUM THYROIDITIS), and other AUTOIMMUNE THYROIDITIS subtypes.
Thyroiditis, Autoimmune
Inflammatory disease of the THYROID GLAND due to autoimmune responses leading to lymphocytic infiltration of the gland. It is characterized by the presence of circulating thyroid antigen-specific T-CELLS and thyroid AUTOANTIBODIES. The clinical signs can range from HYPOTHYROIDISM to THYROTOXICOSIS depending on the type of autoimmune thyroiditis.
Thyroiditis, Subacute
Spontaneously remitting inflammatory condition of the THYROID GLAND, characterized by FEVER; MUSCLE WEAKNESS; SORE THROAT; severe thyroid PAIN; and an enlarged damaged gland containing GIANT CELLS. The disease frequently follows a viral infection.
About the E06 Code Range
Thyroiditis is inflammation of the thyroid gland. E06 separates it by the type named in the diagnosis.
E06.0 is acute thyroiditis, and E06.1 is subacute thyroiditis. Chronic thyroiditis is split between cases with transient thyrotoxicosis (E06.2) and other chronic thyroiditis (E06.5). Separate codes identify autoimmune thyroiditis (E06.3), drug-induced thyroiditis (E06.4), and thyroiditis without a specified type (E06.9).
Questions About This Page
How many billable codes are in the E06 range?
Of the 8 codes in this range, 7 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the E06 range classify?
The range classifies thyroiditis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
