ICD-10 Code E05.0 – Thyrotoxicosis with diffuse goiter (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E05.0 – Thyrotoxicosis with diffuse goiter
What it is
E05.0 identifies thyrotoxicosis caused by a diffuse enlargement of the thyroid gland. It means the patient has excess thyroid hormone activity with a uniformly enlarged goiter.
Clinical signs
Typical findings include signs of hyperthyroidism, such as weight loss, tremor, heat intolerance, palpitations, and a diffusely enlarged thyroid. Clinical features vary; refer to documentation.
When to use this code
Use E05.0 when the record clearly documents thyrotoxicosis with diffuse goiter, including Graves-related diffuse thyroid enlargement when stated that way. Apply it when the provider links the hyperthyroid state to the diffuse goiter. Check documentation if the cause is not specified.
Do not use for
Do not use this code for goiter without thyrotoxicosis, or for toxic nodular goiter. If the chart describes another thyroid disorder or the goiter pattern is not diffuse, verify the diagnosis first.
Coding tip
Confirm both thyrotoxicosis and diffuse goiter are documented together before assigning E05.0.