Benign neoplasm of left renal pelvis

This code signifies the presence of a non-malignant tumor originating in the lining of the left renal pelvis, the funnel-shaped structure that collects urine from the kidney before it passes to the ureter. These benign growths are typically slow-growing and do not metastasize to other parts of the body.

Assign this code when diagnostic imaging (e.g., CT scan, MRI, ultrasound) or biopsy confirms a benign neoplasm located specifically within the left renal pelvis. Documentation must clearly state the benign nature and the precise anatomical location within the left kidney.

• Ensure laterality is explicitly documented as "left" to avoid unspecified coding.
• Distinguish from malignant neoplasms of the renal pelvis (C65.1) and benign neoplasms of other parts of the kidney.
• Confirm the tumor is truly benign; if uncertain or "of uncertain behavior," refer to D49.5.