ICD-10 Code C79.71 – Secondary malignant neoplasm of right adrenal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C79.71 – Secondary malignant neoplasm of right adrenal gland
What it is
This code identifies metastatic cancer involving the right adrenal gland. Use it when documentation states a secondary malignant neoplasm, meaning the adrenal lesion came from another primary cancer site.
Clinical signs
Clinical features vary; refer to documentation. Findings may include an adrenal mass on imaging or pathology confirming metastatic disease, often in a patient with a known primary malignancy elsewhere.
When to use this code
Use C79.71 when the record specifically identifies metastasis to the right adrenal gland. It may be supported by imaging, biopsy, operative findings, or oncology notes. Code the primary cancer separately when documented, and follow sequencing rules in the chart.
Do not use for
Do not use this code for a primary adrenal gland cancer or for benign adrenal lesions. If the side is not documented, check documentation rather than assuming right-sided disease.
Coding tip
Verify laterality and confirm that the adrenal lesion is secondary, not primary, before assigning C79.71.