Endoscopic retrograde cholangiopancreatography (ERCP) is a medical procedure used to diagnose and treat conditions related to the bile ducts, gallbladder, and pancreas. It combines endoscopy and fluoroscopy to visualize these structures. During the procedure, a flexible tube with a camera is inserted through the mouth and into the digestive tract, allowing doctors to see and access the bile and pancreatic ducts. ERCP can help identify issues such as gallstones, bile duct obstructions, and pancreatitis. It may also involve therapeutic interventions, such as removing stones or placing stents to relieve blockages. This procedure is typically performed by a gastroenterologist.