ICD-10 Code E05.8 – Other thyrotoxicosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E05.8 – Other thyrotoxicosis
What it is
Other thyrotoxicosis refers to excess thyroid hormone effects that do not fit a more specific thyrotoxicosis category. Use this code when the record documents thyrotoxicosis, but the cause is not otherwise classified.
Clinical signs
Common findings include symptoms of hyperthyroidism such as weight loss, palpitations, tremor, heat intolerance, and anxiety. Clinical features vary; refer to documentation.
When to use this code
Use E05.8 when the clinician documents thyrotoxicosis and does not identify Graves disease, thyroiditis, toxic nodular goiter, or another specific cause. It may also apply when the note states an atypical or unspecified thyrotoxic condition that is still clearly documented.
Do not use for
Do not use this code when the record supports a more specific thyrotoxicosis diagnosis, such as Graves disease or toxic adenoma. If the documentation only says hyperthyroidism without further detail, check documentation.
Coding tip
Assign the most specific thyrotoxicosis code available and verify the documented cause before defaulting to E05.8.