ICD-10 Code D35.9 – Benign neoplasm of endocrine gland, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D35.9 – Benign neoplasm of endocrine gland, unspecified
What it is
D35.9 identifies a noncancerous tumor of an endocrine gland when the specific gland is not documented. It tells you the lesion is benign, but the record does not name the endocrine organ involved.
Clinical signs
Clinical features vary; refer to documentation. Benign endocrine tumors may be found on imaging, physical exam, or endocrine workup, and they may cause symptoms from hormone production or local mass effect.
When to use this code
Use D35.9 when the provider documents a benign neoplasm of an endocrine gland but does not specify the gland. It also fits when the record confirms a benign endocrine tumor and laterality or site detail is unavailable. If the note names the gland, code that more specific option instead.
Do not use for
Do not use this code for malignant neoplasms, uncertain behavior, or endocrine hyperplasia. If the documentation identifies a specific gland, use the more precise code rather than this unspecified category.
Coding tip
Query for the exact endocrine gland whenever the record only says “endocrine tumor” or “benign neoplasm.”