ICD-10 Code C65.2 – Malignant neoplasm of left renal pelvis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C65.2 – Malignant neoplasm of left renal pelvis
What it is
C65.2 identifies a malignant tumor arising in the left renal pelvis, the collecting area where urine drains from the kidney into the ureter. Use it when documentation specifies a primary cancer in that exact location.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings for renal pelvis cancer include hematuria, flank pain, and imaging or endoscopic evidence of a mass in the left renal pelvis.
When to use this code
Use C65.2 when the provider documents primary malignant neoplasm of the left renal pelvis, including pathology-confirmed cancer or a clearly stated clinical diagnosis. It may also apply when the record identifies a tumor in the left renal pelvis without further site ambiguity. Check documentation if the note only says upper urinary tract cancer.
Do not use for
Do not use this code for malignancy of the left kidney parenchyma, ureter, or bladder. If the laterality or exact site is unclear, check documentation before coding.
Coding tip
Verify that “renal pelvis” is stated explicitly and that the left side is documented before assigning C65.2.