All
 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 +
 E04.210.240.250.160 Colonoscopy D003113 +
 E04.210.240.250.200 Duodenoscopy D004384 
 E04.210.240.250.320 Gastroscopy D005773 
 E04.210.240.250.680 Proctoscopy D011351 
 E04.210.240.250.840 Sphincterotomy, Endoscopic D016717