ICD-10-CM Code E06.9

Thyroiditis, unspecified

Version 2021 Billable Code

Valid for Submission

E06.9 is a billable code used to specify a medical diagnosis of thyroiditis, unspecified. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code E06.9 might also be used to specify conditions or terms like euthyroid thyroiditis, focal thyroiditis, goiter due to thyroiditis, hypothyroidism due to thyroiditis, silent thyroiditis, thyroid disease in mother complicating childbirth, etc

Short Description:Thyroiditis, unspecified
Long Description:Thyroiditis, unspecified

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code E06.9 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Euthyroid thyroiditis
  • Focal thyroiditis
  • Goiter due to thyroiditis
  • Hypothyroidism due to thyroiditis
  • Silent thyroiditis
  • Thyroid disease in mother complicating childbirth
  • Thyroid disease in pregnancy
  • Thyroid infection
  • Thyroiditis
  • Thyroiditis in mother complicating childbirth
  • Thyroiditis in pregnancy

Clinical Information

  • 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.
  • 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.

Convert E06.9 to ICD-9

Code Classification

  • Endocrine, nutritional and metabolic diseases (E00–E90)
    • Disorders of thyroid gland (E00-E07)
      • Thyroiditis (E06)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients

Thyroid Diseases

Your thyroid is a butterfly-shaped gland in your neck, just above your collarbone. It is one of your endocrine glands, which make hormones. Thyroid hormones control the rate of many activities in your body. These include how fast you burn calories and how fast your heart beats. All of these activities are your body's metabolism.

Thyroid problems include

  • Goiter - enlargement of the thyroid gland
  • Hyperthyroidism - when your thyroid gland makes more thyroid hormones than your body needs
  • Hypothyroidism - when your thyroid gland does not make enough thyroid hormones
  • Thyroid cancer
  • Thyroid nodules - lumps in the thyroid gland
  • Thyroiditis - swelling of the thyroid

To diagnose thyroid diseases, doctors use a medical history, physical exam, and thyroid tests. They sometimes also use a biopsy. Treatment depends on the problem, but may include medicines, radioiodine therapy, or thyroid surgery.

Dept. of Health and Human Services Office on Women's Health

  • Antithyroglobulin antibody (Medical Encyclopedia)
  • Antithyroid microsomal antibody (Medical Encyclopedia)
  • Fine needle aspiration of the thyroid (Medical Encyclopedia)
  • Goiter (Medical Encyclopedia)
  • Radioactive iodine uptake (Medical Encyclopedia)
  • Silent thyroiditis (Medical Encyclopedia)
  • Subacute thyroiditis (Medical Encyclopedia)
  • T3 test (Medical Encyclopedia)
  • T4 test (Medical Encyclopedia)
  • Thyroid gland removal (Medical Encyclopedia)
  • Thyroid nodule (Medical Encyclopedia)
  • Thyroid storm (Medical Encyclopedia)
  • Thyroid Tests - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • TSH test (Medical Encyclopedia)

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