All

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 E04 Surgical Procedures, Operative D013514 +
  E04.210 Digestive System Surgical Procedures D013505 +
   E04.210.120 Biliary Tract Surgical Procedures D001662 +
    E04.210.120.850 Sphincterotomy, Endoscopic D016717 
 E04 Surgical Procedures, Operative D013514 +
  E04.210 Digestive System Surgical Procedures D013505 +
   E04.210.240 Endoscopy, Digestive System D016145 +
    E04.210.240.250 Endoscopy, Gastrointestinal D016099 +
     E04.210.240.250.840 Sphincterotomy, Endoscopic D016717 
 E04 Surgical Procedures, Operative D013514 +
  E04.800 Surgical Procedures, Minimally Invasive D019060 +
   E04.800.250 Endoscopy D004724 +
    E04.800.250.250 Endoscopy, Digestive System D016145 +
     E04.800.250.250.250 Endoscopy, Gastrointestinal D016099 +
      E04.800.250.250.250.840 Sphincterotomy, Endoscopic D016717