ICD-10 Code E35 – Disorders of endocrine glands in diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E35 – Disorders of endocrine glands in diseases classified elsewhere
What it is
E35 identifies endocrine gland disorders that are caused by another underlying disease, not a primary endocrine condition. Use it when the gland problem is documented as secondary to a separate, known disorder.
Clinical signs
Clinical features vary; refer to documentation. You may see signs of hormone imbalance, gland dysfunction, or related systemic disease, but the underlying cause should be clearly stated in the record.
When to use this code
Use E35 when the provider links the endocrine disorder to another disease and the documentation supports a secondary cause. It fits cases where the endocrine gland involvement is part of a broader condition rather than an isolated diagnosis. Check documentation for the specific underlying disease and any associated manifestations.
Do not use for
Do not use this code for primary endocrine gland disorders coded elsewhere in ICD-10-CM. Also avoid it when the record does not clearly show that the endocrine condition is due to another disease.
Coding tip
Always code the underlying disease first when documentation supports a causal link, and verify whether an additional code for the endocrine manifestation is needed.