Benign neoplasm of extrahepatic bile ducts

This code signifies the presence of a non-cancerous growth originating from the bile ducts located outside the liver. These benign neoplasms, such as adenomas or papillomas, can obstruct bile flow but do not metastasize.

Apply this code when documentation explicitly states a benign tumor or neoplasm of the extrahepatic bile ducts, including the common bile duct, cystic duct, or hepatic ducts outside the liver parenchyma. Supporting documentation would include pathology reports confirming benignity and imaging studies identifying the lesion's location.

• Differentiate carefully between benign and malignant neoplasms; malignant extrahepatic bile duct tumors are coded to C24.0.
• Ensure the documentation specifies "extrahepatic" to avoid confusion with intrahepatic bile duct neoplasms (D13.4).
• If the specific type of benign neoplasm (e.g., adenoma, papilloma) is known, this code still applies as it is a general category for benign extrahepatic bile duct tumors.