2026 ICD-10-CM Diagnosis Code E06Thyroiditis

ICD-10-CM Codes›E00–E89›E00-E07›E06

ICD-10-CM E06
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E06 is a non-billable ICD-10-CM category code for thyroiditis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E06.0, E06.1, E06.2, and E06.3.

Code Identity

ICD-10-CM Code
E06
Billable Status
No — Non-Billable Category
Code Describes
Thyroiditis
Chapter
E00-E07
Disorders of thyroid gland

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE00-E07Disorders of thyroid gland
CategoryE06Thyroiditis
This CodeE06Thyroiditis

Specific Coding for ThyroiditisOverview

Non-specific codes like E06 require more characters. Use one of these billable codes instead:

  • Use E06.0 for Acute thyroiditis

  • Use E06.1 for Subacute thyroiditis

  • Use E06.2 for Chronic thyroiditis with transient thyrotoxicosis

  • Use E06.3 for Autoimmune thyroiditis

  • Use E06.4 for Drug-induced thyroiditis

  • Use E06.5 for Other chronic thyroiditis

  • Use E06.9 for Thyroiditis, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • postpartum thyroiditis O90.5

Clinical InformationClinical

  • 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.

Patient EducationClinical

Thyroid Diseases

Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions. For example, they affect your breathing, heart rate, weight, digestion, and moods.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E06Overview

Is E06 (Thyroiditis) a billable code?

No. This is a category header that groups the codes for thyroiditis, and headers cannot be submitted on claims. Claims for thyroiditis need a more specific code from this category, such as E06.0, E06.1, and E06.2.