ICD-10 Code C74.0 – Malignant neoplasm of cortex of adrenal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C74.0 – Malignant neoplasm of cortex of adrenal gland
What it is
This code identifies a malignant tumor arising from the adrenal cortex, the outer layer of the adrenal gland. Use it for confirmed primary cancer of that specific glandular tissue.
Clinical signs
Clinical features vary; refer to documentation. Patients may have an adrenal mass, abdominal or flank pain, or hormone-related findings if the tumor is functional.
When to use this code
Use C74.0 when the record clearly documents a malignant neoplasm of the adrenal cortex, including pathology or specialist confirmation. It is appropriate for newly diagnosed cases, active treatment encounters, and follow-up visits related to the primary tumor. Check documentation if the site is described only as adrenal gland or adrenal tumor.
Do not use for
Do not use this code for benign adrenal tumors, adrenal medulla tumors, or secondary metastatic disease to the adrenal gland. If the documentation is unclear, check documentation.
Coding tip
Confirm that the provider specifies the cortex, not just the adrenal gland, before assigning C74.0.