Secondary malignant neoplasm of unsp kidney and renal pelvis

This code signifies the presence of a metastatic cancerous tumor in an unspecified kidney or renal pelvis, meaning the cancer originated elsewhere in the body and spread to this location. It indicates that the kidney or renal pelvis is not the primary site of the malignancy.

Use this code when documentation clearly states a secondary or metastatic malignancy affecting the kidney or renal pelvis, without specifying laterality. This is appropriate when the primary cancer site is known or unknown, but the kidney involvement is definitively secondary.

• Always sequence the primary malignancy code before this secondary site code, if known.
• Avoid using this code if the documentation specifies a primary kidney or renal pelvis cancer; instead, use a C64.- code.
• Do not use this code if laterality (left or right kidney) is documented; use C79.01 or C79.02 accordingly.