ICD-10 Code E05.20 – Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E05.20 – Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm
What it is
This code identifies hyperthyroidism caused by a toxic multinodular goiter, with excess thyroid hormone production but without thyroid storm. Use it when the multinodular goiter is the documented source of thyrotoxicosis.
Clinical signs
Typical findings include goiter with multiple nodules and signs of thyroid hormone excess. Clinical features vary; refer to documentation for symptoms such as weight loss, tremor, palpitations, heat intolerance, or anxiety.
When to use this code
Use E05.20 when the provider documents toxic multinodular goiter and thyrotoxicosis, but specifically states there is no thyrotoxic crisis or storm. It also fits follow-up visits when the diagnosis remains active and supported by the record. Check documentation if the note only says multinodular goiter without thyrotoxicosis.
Do not use for
Do not use this code for thyroid storm, which requires a different ICD-10-CM code. Also avoid it when the goiter is multinodular but nontoxic, or when another thyroid disorder is documented as the cause.
Coding tip
Confirm both “toxic multinodular goiter” and the absence of thyroid storm in the provider’s documentation before assigning E05.20.