ICD-10 Code C75.9 – Malignant neoplasm of endocrine gland, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C75.9 – Malignant neoplasm of endocrine gland, unspecified
What it is
C75.9 identifies a malignant tumor arising in an endocrine gland when the specific gland is not documented. Use it for cancer records that confirm an endocrine origin but do not name the exact site.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a documented endocrine gland mass, biopsy-proven malignancy, or imaging and pathology supporting cancer in an unspecified endocrine site.
When to use this code
Use C75.9 when the provider states malignant neoplasm of an endocrine gland and does not specify the gland involved. It also fits when the chart confirms endocrine malignancy but the site remains unclarified after review.
If later documentation identifies the exact gland, you should code the more specific malignant neoplasm instead. Keep the chart language aligned with the final diagnosis and pathology when available.
Do not use for
Do not use this code for benign endocrine tumors, metastatic disease to an endocrine gland, or cancers of a clearly named endocrine organ. Check documentation if the primary site is uncertain.
Coding tip
Review pathology and operative notes first; if the endocrine gland is named anywhere in the record, code the specific site rather than C75.9.