ICD-10 Code C64.2 – Malignant neoplasm of left kidney, except renal pelvis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C64.2 – Malignant neoplasm of left kidney, except renal pelvis
What it is
C64.2 identifies a malignant tumor arising in the left kidney, excluding tumors of the renal pelvis. Use this code when the record clearly documents primary kidney cancer on the left side.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include a renal mass on imaging, hematuria, flank pain, or an incidental kidney lesion suspicious for malignancy.
When to use this code
Use C64.2 when the provider documents primary malignant neoplasm of the left kidney, except renal pelvis. It also fits cases where pathology or imaging confirms left renal cancer and the site is specified as the kidney rather than the renal pelvis. Check documentation if laterality is unclear.
Do not use for
Do not use this code for renal pelvis cancer, which is coded separately. Also avoid it when the chart only states kidney mass, renal cyst, or metastatic disease without a documented primary left kidney malignancy.
Coding tip
Confirm both laterality and anatomic site in the report before assigning C64.2.