Gastroenterology Tests Make an Appointment Ask a Question Refer Patient Gastroenterology involves the diagnosis and treatment of digestive system disorders affecting the esophagus, stomach, small and large intestines, rectum, liver, gall bladder and pancreas. Before treatment can begin, your doctor needs to determine the source of the problem with certain gastroenterology tests. Learn about some of the gastroenterology tests we offer: Pediatric Endoscopy Impedance and pH Study for Children Adult 72 Hour Fecal Fat Test Banding/Ligation of Hemorrhoids: CRH O’Regan System BRAVO pH Monitoring Colon Transit Study Colonoscopy Esophageal Manometry Test Esophageal Motility Study Esophagoscopy Gastroscopy Duodenoscopy (EGD) Hydrogen/Methane Breath Test Impedance and pH Study for Adults Impedance and pH Study for Children Patency Test with Agile™ Patency Capsule Pediatric Endoscopy PillCam Small Bowel Capsule Endoscopy Secretin Stimulation Test Sigmoidoscopy Ultrasound-Guided Liver Biopsy