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C64.9 — Malignant neoplasm of unspecified kidney, except renal pelvis
C64.9
What this code means
Cancer that starts in a kidney, most often renal cell carcinoma arising from the kidney's filtering tissue.
Also called: kidney cancer, renal cell carcinoma, rcc.
When this code is used
Used for malignant neoplasm of a kidney (except the renal pelvis) when the side is not specified.
Where it sits in ICD-10-CM
Code C64.9 belongs to Chapter 2: Neoplasms, which covers codes C00–D49 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.
Learn more about this condition
Related symptoms
Related anatomy
Frequently asked questions
What is ICD-10-CM code C64.9?
C64.9 is the ICD-10-CM diagnosis code for “Malignant neoplasm of unspecified kidney, except renal pelvis”. Cancer that starts in a kidney, most often renal cell carcinoma arising from the kidney's filtering tissue.
When is code C64.9 used?
Used for malignant neoplasm of a kidney (except the renal pelvis) when the side is not specified. It belongs to Chapter 2 of ICD-10-CM (Neoplasms).
This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.