ICD-10 Code E06.0 – Acute thyroiditis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E06.0 – Acute thyroiditis
What it is
E06.0 identifies acute inflammation of the thyroid gland. Use this code when the record documents a sudden, active thyroiditis rather than a chronic or noninfectious thyroid disorder.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include anterior neck pain or tenderness, thyroid enlargement, and signs of acute inflammatory illness.
When to use this code
Use E06.0 when the provider clearly documents acute thyroiditis, including infectious or suppurative thyroid inflammation if recorded as acute thyroiditis. Apply it when the note supports an active thyroid infection or inflammation affecting the gland. Check documentation if the type is not specified.
Do not use for
Do not use E06.0 for chronic thyroiditis, autoimmune thyroiditis, or thyroid disorders without acute inflammation. If the record only says thyroid pain or goiter, check documentation.
Coding tip
Code the specific thyroiditis type documented; if the chart is vague, query the provider before assigning E06.0.