ICD-10 Code E05.00 – Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E05.00 – Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm
What it is
This code identifies thyrotoxicosis due to a diffuse goiter, meaning the thyroid is overactive and enlarged throughout rather than in one nodule. It excludes thyroid storm or crisis.
Clinical signs
Typical findings include symptoms of hyperthyroidism such as weight loss, heat intolerance, tremor, palpitations, and a diffusely enlarged thyroid. Clinical features vary; refer to documentation.
When to use this code
Use E05.00 when the record documents thyrotoxicosis with diffuse goiter and no thyroid storm or crisis. It fits cases where the provider specifies diffuse goiter, Graves’ disease-related thyrotoxicosis, or similar wording. If the chart does not clearly support diffuse goiter, check documentation.
Do not use for
Do not use this code for thyrotoxicosis with thyroid storm or crisis, or when the goiter is nodular rather than diffuse. Check documentation if the cause or goiter type is not stated.
Coding tip
Assign the code only when the provider documents diffuse goiter; otherwise, verify the thyroid condition and goiter type before coding.