Thyroiditis (E06)
ICD-10 code section E06 covers various forms of thyroiditis, which is inflammation of the thyroid gland. These codes are used to specify the exact type of thyroid inflammation, such as acute, subacute, autoimmune, drug-induced, or chronic forms, helping healthcare providers accurately document and treat these conditions.
The ICD-10 code for acute thyroiditis (E06.0) applies to sudden infections like abscesses or bacterial and fungal thyroid infections, also known as acute suppurative or infectious thyroiditis. Subacute thyroiditis (E06.1) includes viral or granulomatous inflammation, often called viral or mumps thyroiditis. Autoimmune thyroiditis (E06.3) encompasses conditions like Hashimoto thyroiditis and related autoimmune disorders that affect thyroid function. Cases caused by medications, such as iodine or amiodarone, fall under drug-induced thyroiditis (E06.4). Other chronic forms, including Riedel's thyroiditis or fibrous invasive thyroiditis, are classified as other chronic thyroiditis (E06.5). When the specific type is unclear, thyroiditis, unspecified (E06.9) is used, covering terms like silent thyroiditis and thyroid inflammation during pregnancy. These codes guide medical coders in assigning the precise ICD-10 code for thyroiditis-related diagnoses.
Instructional Notations
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
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Hashimoto Disease
Chronic autoimmune thyroiditis, characterized by the presence of high serum thyroid AUTOANTIBODIES; GOITER; and HYPOTHYROIDISM.
Postpartum Thyroiditis
Transient autoimmune thyroiditis occurring in the POSTPARTUM PERIOD. It is characterized by the presence of high titers of AUTOANTIBODIES against THYROID PEROXIDASE and THYROGLOBULIN. Clinical signs include the triphasic thyroid hormone pattern: beginning with THYROTOXICOSIS, followed with HYPOTHYROIDISM, then return to euthyroid state by 1 year postpartum.
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.
Thyroiditis, Suppurative
Acute inflammatory disease of the THYROID GLAND due to infections by BACTERIA; FUNGI; or other microorganisms. Symptoms include tender swelling, FEVER, and often with LEUKOCYTOSIS.
