ICD-10 Code C74.1 – Malignant neoplasm of medulla of adrenal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C74.1 – Malignant neoplasm of medulla of adrenal gland
What it is
C74.1 identifies a malignant tumor arising in the adrenal medulla, the inner portion of the adrenal gland. Use it when the documentation specifies cancer of the adrenal medulla.
Clinical signs
Clinical features vary; refer to documentation. Tumors of the adrenal medulla may present with symptoms related to catecholamine excess or may be found incidentally on imaging.
When to use this code
Use C74.1 when the provider documents a primary malignant neoplasm of the adrenal medulla, including a confirmed malignant pheochromocytoma if described that way. Apply it when the record clearly distinguishes the medulla from the adrenal cortex or another adrenal site.
If the note only says “adrenal cancer” or “adrenal mass,” check documentation for the exact site and behavior before assigning this code.
Do not use for
Do not use C74.1 for benign adrenal tumors, metastatic disease to the adrenal gland, or malignant neoplasms of the adrenal cortex. Check documentation if the primary site is unclear.
Coding tip
Confirm both malignancy and medullary origin in the provider note before coding C74.1.