Malignant neoplasm of left kidney, except renal pelvis

This code signifies a primary cancerous tumor originating in the parenchymal tissue of the left kidney, excluding the renal pelvis. It indicates a malignant growth within the main body of the left kidney, such as renal cell carcinoma.

Use this code when documentation confirms a primary malignant neoplasm located specifically in the left kidney, excluding any involvement of the renal pelvis. This is appropriate for diagnoses like left renal cell carcinoma or other primary malignant tumors of the left kidney parenchyma.

• Ensure laterality (left) is clearly documented.
• Distinguish from malignant neoplasms of the renal pelvis (C65.-) or unspecified kidney (C64.9).
• Always sequence as the primary diagnosis when the patient is receiving active treatment for the malignancy.