Malignant neoplasm of kidney, except pelvis

This code signifies a primary cancerous tumor originating within the renal parenchyma, excluding the renal pelvis. It encompasses various histological types of kidney cancer, such as renal cell carcinoma (RCC), which is the most common form. This diagnosis indicates a malignant growth requiring treatment.

Use this code for documented cases of primary malignant neoplasms affecting the kidney itself, as confirmed by pathology reports or imaging studies. This applies when the tumor is specifically located in the kidney tissue, distinct from the renal pelvis. Documentation should clearly state "malignant neoplasm of kidney" or a specific type of renal cell carcinoma.

• Differentiate carefully between malignant neoplasms of the kidney parenchyma and those of the renal pelvis, which code to a different anatomical site.
• Ensure documentation specifies "primary" malignant neoplasm; metastatic lesions to the kidney are coded differently.
• Always review pathology reports for definitive diagnosis and specific tumor type, if available, to support code assignment.