ICD-10 Code C79.01 – Secondary malignant neoplasm of right kidney and renal pelvis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C79.01 – Secondary malignant neoplasm of right kidney and renal pelvis
What it is
This code identifies metastatic cancer that has spread to the right kidney or renal pelvis from another primary site. Use it when the record clearly states secondary malignant involvement of the right renal structures.
Clinical signs
Clinical features vary; refer to documentation. Patients may have imaging or pathology evidence of metastatic disease in the right kidney or renal pelvis, sometimes with hematuria, flank pain, or obstruction.
When to use this code
Use C79.01 when the provider documents secondary malignant neoplasm specifically involving the right kidney or renal pelvis. This is appropriate for confirmed metastatic disease, including findings on imaging, biopsy, or operative reports. Code the primary malignancy separately when known and documented.
Do not use for
Do not use this code for primary kidney cancer, benign renal masses, or nonspecific “kidney metastasis” without laterality. Check documentation if the site is only described as renal or urinary tract without confirmation of the right side.
Coding tip
Verify both laterality and metastatic status in the record before assigning C79.01.