2025 ICD-10-CM Diagnosis Code E06.3

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Autoimmune thyroiditis

  • E06.3 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2025 edition of ICD-10-CM E06.3 became effective on October 1, 2024.
  • This is the American ICD-10-CM version of E06.3 – other international versions of ICD-10 E06.3 may differ.

Applicable To

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

The following code(s) above E06.3 contain annotation back-references

 that may be applicable to E06.3:

  • E00-E89  Endocrine, nutritional and metabolic diseases
  • E06  Thyroiditis

Approximate Synonyms

  • Fibrous autoimmune thyroiditis
  • Hashimoto thyroiditis
  • Thyroiditis (inflammation of thyroid), hashimotos
  • Thyroiditis, autoimmune
  • Thyroiditis, fibrous autoimmune

Clinical Information

  • An autoimmune condition of the thyroid gland (a gland located beneath the larynx). It is caused by the formation of antibodies that attack the thyroid gland and it usually causes hypothyroidism (too little thyroid hormone). Symptoms include fatigue, weight gain, constipation, dry skin, depression, and the inability to exercise. It is more common in females and can run in families.
  • An autoimmune disorder caused by the production of autoantibodies against thyroid tissue. There is progressive destruction of the thyroid follicles leading to hypothyroidism.
  • An inflammatory disorder that affects the thyroid gland. It is characterized by the infiltration of the thyroid parenchyma by lymphocytes. It includes hashimoto thyroiditis and subacute lymphocytic thyroiditis.
  • Chronic autoimmune thyroiditis, characterized by the presence of high serum thyroid autoantibodies; goiter; and hypothyroidism.
  • Diffuse infiltration of the thyroid gland with lymphocytes, resulting in diffuse goiter, progressive destruction of the parenchyma and hypothyroidism.
  • 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.
  • Progressive enlargement of the thyroid gland, often associated with hypothyroidism.

ICD-10-CM E06.3 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

  • 011 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with mcc
  • 012 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with cc
  • 013 Tracheostomy for face, mouth and neck diagnoses or laryngectomy without cc/mcc
  • 643 Endocrine disorders with mcc
  • 644 Endocrine disorders with cc
  • 645Endocrine disorders without cc/mcc

Convert E06.3 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change

Code annotations containing back-references to E06.3:

Diagnosis Index entries containing back-references to E06.3:

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