Gastroenterology is the branch within Internal Medicine which focuses on ingestion, digestion, utilization, elimination of which we intake, digestive system, and its disorders. It includes all the organs involved in digestion starting from mouth, tongue, saliva, oesophagus, stomach, small and large intestine, side organs of liver, biliary and pancreatic systems, and finally ends up in the rectum for excretion. Gastroenterology mainly refers to the diseases affecting the gastrointestinal tract. A wide range of research on gastroenterology is carried out in USA particularly in Mayo Clinic, Cleveland Clinic, Johns Hopkins Hospital, Massachusetts General Hospital, UCLA Medical Center, UPMC Presbyterian Shadyside, Mount Sinai Hospital, Cedars-Sinai Medical Center. Studies at these institutes shows that most of the gastroenterology disorders such as constipation, diarrhoea, nausea and vomiting vary widely among the residents of USA. More than 15 million people in the United States have been reported to suffer from these disorders as per the recent census.