CPT® Code 74330

Combined endoscopic catheterization of the biliary and pancreatic ductal systems, radiological supervision and interpretation

Combined endoscopic catheterization of the biliary and pancreatic ductal systems, commonly referred to as endoscopic retrograde cholangiopancreatography (ERCP), is a specialized procedure utilized for both diagnostic and therapeutic purposes. This procedure is essential for identifying and addressing various conditions affecting the biliary and pancreatic ducts, including obstructions, dilations, inflammations, stones, or tumors. The biliary system is responsible for transporting bile produced in the liver, which is crucial for digestion, while the pancreatic duct carries digestive enzymes from the pancreas. Understanding the anatomy of these systems is vital, as bile secreted from the liver travels through the left and right hepatic ducts, merging to form the common hepatic duct. This duct then connects with the cystic duct from the gallbladder, ultimately forming the common bile duct that delivers bile to the duodenum. Approximately 50 percent of the bile produced is stored in the gallbladder before being released into the duodenum via the common bile duct. The pancreatic duct joins the common bile duct just before it empties into the duodenum at the ampulla of Vater, where both bile and pancreatic fluids are released. During the ERCP procedure, the patient is sedated, and an endoscope is inserted orally to reach the duodenal papilla. To facilitate the procedure, medications such as anti-cholinergics, glucagon, or nitroglycerin may be administered to relax the sphincter of Oddi, allowing for easier access. A catheter is then carefully advanced through the endoscope to cannulate the ampulla of Vater, followed by the injection of contrast dye into the ducts. This imaging technique enables visualization of the biliary tract, gallbladder, and pancreas through X-ray imaging. The procedure is typically performed by a gastroenterologist, often in collaboration with a radiologist, to ensure accurate radiological supervision and interpretation, which is reported using CPT® Code 74330.