Secondary malignant neoplasm of r kidney and renal pelvis

This code signifies the presence of a metastatic cancerous tumor that originated in another primary site and has spread to the right kidney or its renal pelvis. It indicates that the kidney is not the primary origin of the malignancy but rather a site of secondary involvement.

Use this code when documentation clearly states a secondary or metastatic malignancy affecting the right kidney or renal pelvis. This typically occurs in patients with a known primary cancer elsewhere in the body, and imaging or biopsy confirms spread to the right kidney.

• Always sequence the primary malignant neoplasm code before this secondary site code.
• Distinguish carefully between primary renal cell carcinoma (C64.1) and metastatic disease to the kidney.
• Ensure documentation specifies "right" kidney; if laterality is unspecified, use the appropriate unspecified laterality code.