ICD-10 Code D35 – Benign neoplasm of other and unspecified endocrine glands (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D35 – Benign neoplasm of other and unspecified endocrine glands
What it is
D35 identifies a noncancerous tumor of an endocrine gland when the exact gland is not named or falls under the “other” category. Use it for benign endocrine growths documented by the clinician.
Clinical signs
Clinical features vary; refer to documentation. These lesions may be found on imaging, exam, or pathology, and may cause local mass effect or hormone-related findings if the gland is functional.
When to use this code
Use D35 when the record clearly states a benign neoplasm involving an endocrine gland, but the documentation does not support a more specific site code. It is also appropriate when pathology or provider notes confirm benign behavior and the gland is not separately indexed.
Check documentation if the lesion is described as uncertain, metastatic, malignant, or merely a cyst, hyperplasia, or adenoma without a benign neoplasm diagnosis.
Do not use for
Do not use D35 for malignant endocrine tumors, secondary neoplasms, or non-neoplastic endocrine disorders. Do not assign it when the chart only says “rule out” or lacks a confirmed benign neoplasm.
Coding tip
Code the most specific endocrine gland available first; use D35 only when the provider does not identify a more precise benign neoplasm code.