ICD-10 Code E06.5 – Other chronic thyroiditis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E06.5 – Other chronic thyroiditis
What it is
E06.5 identifies chronic inflammation of the thyroid that does not fit more specific thyroiditis categories. It is used when the record supports a persistent thyroiditis diagnosis, but the exact subtype is not otherwise specified.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a chronic thyroid disorder with thyroid enlargement, thyroid tenderness absent or minimal, or thyroid function changes, depending on the underlying condition.
When to use this code
Use this code when the provider documents other chronic thyroiditis and does not name a more specific type such as Hashimoto’s thyroiditis. It may also apply when the chart confirms chronic thyroid inflammation but the exact etiology is not clarified. Check documentation for specificity before assigning E06.5.
Do not use for
Do not use this code for acute thyroiditis or for thyroiditis with a documented specific subtype that has its own code. Do not use it when the diagnosis is uncertain or when the record only states thyroid dysfunction without thyroiditis.
Coding tip
Verify the provider’s wording carefully; if a more specific chronic thyroiditis type is documented, code that diagnosis instead of E06.5.