ICD-10 Code E05.80 – Other thyrotoxicosis without thyrotoxic crisis or storm (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E05.80 – Other thyrotoxicosis without thyrotoxic crisis or storm
What it is
This code identifies thyrotoxicosis, meaning excess thyroid hormone effects, when the cause is not captured by a more specific code and there is no thyroid storm. Use it for documented hyperthyroid states that do not fit another E05 category.
Clinical signs
Clinical features may include weight loss, heat intolerance, tremor, palpitations, anxiety, and increased bowel activity. Clinical features vary; refer to documentation, especially when the record does not name a specific thyroid disorder.
When to use this code
Use E05.80 when the clinician documents thyrotoxicosis or hyperthyroid effects but does not specify Graves disease, toxic nodular disease, or another defined cause. It also applies when the note clearly excludes thyroid storm. If the etiology is later clarified, code the more specific diagnosis.
Do not use for
Do not use this code for thyroid storm or thyrotoxic crisis; those require a different code. Also avoid it when documentation supports a more specific thyrotoxicosis type or a non-thyrotoxic thyroid disorder.
Coding tip
Query for the underlying cause and for storm status whenever the note says “hyperthyroid” or “thyrotoxicosis” without detail.