Benign lipomatous neoplasm of kidney

This code signifies a non-cancerous fatty tumor originating in the kidney. These benign neoplasms are typically slow-growing and composed primarily of mature adipose tissue. They are often discovered incidentally during imaging studies performed for other reasons.

Apply this code when documentation confirms a benign lipomatous neoplasm located within the kidney. This diagnosis is typically established through imaging (e.g., CT, MRI, ultrasound) and may be confirmed by biopsy or surgical excision. Use when the physician explicitly states "benign lipoma of kidney" or similar terminology.

• Differentiate from malignant renal neoplasms (C64.-) or neoplasms of uncertain behavior (D39.0).
• Ensure the documentation specifies the kidney as the primary site of the lipoma.
• Do not use for simple renal cysts, which are coded to N28.1.