| 51.01 | Percutaneous aspiration of gallbladder |
| 51.02 | Trocar cholecystostomy |
| 51.03 | Other cholecystostomy |
| 51.04 | Other cholecystotomy |
| 51.10 | Endoscopic retrograde cholangiopancreatography [ERCP] |
| 51.11 | Endoscopic retrograde cholangiography [ERC] |
| 51.12 | Percutaneous biopsy of gallbladder or bile ducts |
| 51.13 | Open biopsy of gallbladder or bile ducts |
| 51.14 | Other closed [endoscopic] biopsy of biliary duct or sphincter of Oddi |
| 51.15 | Pressure measurement of sphincter of Oddi |
| 51.19 | Other diagnostic procedures on biliary tract |
| 51.21 | Other partial cholecystectomy |
| 51.22 | Cholecystectomy |
| 51.23 | Laparoscopic cholecystectomy |
| 51.24 | Laparoscopic partial cholecystectomy |
| 51.31 | Anastomosis of gallbladder to hepatic ducts |
| 51.32 | Anastomosis of gallbladder to intestine |
| 51.33 | Anastomosis of gallbladder to pancreas |
| 51.34 | Anastomosis of gallbladder to stomach |
| 51.35 | Other gallbladder anastomosis |
| 51.36 | Choledochoenterostomy |
| 51.37 | Anastomosis of hepatic duct to gastrointestinal tract |
| 51.39 | Other bile duct anastomosis |
| 51.41 | Common duct exploration for removal of calculus |
| 51.42 | Common duct exploration for relief of other obstruction |
| 51.43 | Insertion of choledochohepatic tube for decompression |
| 51.49 | Incision of other bile ducts for relief of obstruction |
| 51.51 | Exploration of common duct |
| 51.59 | Other incision of other bile duct |
| 51.61 | Excision of cystic duct remnant |
| 51.62 | Excision of ampulla of Vater (with reimplantation of common duct) |
| 51.63 | Other excision of common duct |
| 51.64 | Endoscopic excision or destruction of lesion of biliary ducts or sphincter of Oddi |
| 51.69 | Excision of other bile duct |
| 51.71 | Simple suture of common bile duct |
| 51.72 | Choledochoplasty |
| 51.79 | Repair of other bile ducts |
| 51.81 | Dilation of sphincter of Oddi |
| 51.82 | Pancreatic sphincterotomy |
| 51.83 | Pancreatic sphincteroplasty |
| 51.84 | Endoscopic dilation of ampulla and biliary duct |
| 51.85 | Endoscopic sphincterotomy and papillotomy |
| 51.86 | Endoscopic insertion of nasobiliary drainage tube |
| 51.87 | Endoscopic insertion of stent (tube) into bile duct |
| 51.88 | Endoscopic removal of stone(s) from biliary tract |
| 51.89 | Other operations on sphincter of Oddi |
| 51.91 | Repair of laceration of gallbladder |
| 51.92 | Closure of cholecystostomy |
| 51.93 | Closure of other biliary fistula |
| 51.94 | Revision of anastomosis of biliary tract |
| 51.95 | Removal of prosthetic device from bile duct |
| 51.96 | Percutaneous extraction of common duct stones |
| 51.98 | Other percutaneous procedures on biliary tract |
| 51.99 | Other operations on biliary tract |
