Benign neoplasm of retroperitoneum and peritoneum

This code signifies the presence of a non-cancerous growth originating from the retroperitoneal space or the peritoneal lining of the abdominal cavity. These benign tumors are typically slow-growing and do not metastasize, but can cause symptoms due to mass effect on surrounding organs. Examples include lipomas, fibromas, or leiomyomas in these anatomical locations.

Utilize this code when documentation clearly identifies a benign neoplasm located within the retroperitoneum or peritoneum. This diagnosis is often established through imaging studies (e.g., CT, MRI) and confirmed by biopsy or surgical excision with subsequent histopathological examination. Documentation should specify the benign nature of the growth.

• Differentiate carefully between benign and malignant neoplasms; malignant retroperitoneal/peritoneal tumors have distinct coding.
• Ensure the documentation specifies "retroperitoneum" or "peritoneum" as the primary site; do not use for benign neoplasms of specific organs within these regions.
• Consider additional codes for any associated symptoms or complications caused by the mass effect of the benign neoplasm.