ICD-10 Code C74.90 – Malignant neoplasm of unspecified part of unspecified adrenal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C74.90 – Malignant neoplasm of unspecified part of unspecified adrenal gland
What it is
This code identifies a malignant tumor in an adrenal gland when the exact side and specific adrenal region are not documented. It is used for adrenal cancer cases that remain anatomically unspecified.
Clinical signs
Clinical features vary; refer to documentation. Patients may have findings consistent with an adrenal mass or symptoms related to hormone excess, local invasion, or metastatic disease, but the record must support malignancy.
When to use this code
Use C74.90 when the provider documents malignant neoplasm of the adrenal gland but does not identify whether it is right or left, cortical or medullary, or another specific part. It also fits when laterality is unknown in the final diagnosis. If the chart names a more specific adrenal site, code that instead.
Do not use for
Do not use this code for benign adrenal tumors, adrenal hyperplasia, or secondary malignant neoplasms involving the adrenal gland. Check documentation if the lesion is described only as a mass, lesion, or adrenal incidentaloma.
Coding tip
Query for laterality and exact adrenal site whenever the pathology or operative note is unclear.