Gastroenterology essentially addresses diseases of the esophagus, stomach, small intestine, colon and rectum, pancreas, gallbladder, bile ducts and liver. The functioning of the entire digestive system, both related to the passage of food through the digestive canal to the physiological processes of food digestion, absorption and elimination come under the purview of this specialty.

It includes the medical and surgical treatment of diseases such as colon polyps, Peptic Ulcer Disease,  Gastrointestinal Cancer, Jaundice, Liver Cirrhosis, Liver Hepatitis, Gastroesophageal Reflux Disease (GERD) (Heartburn), Peptic Ulcer Disease, Colitis, Gallbladder and Biliary Tract Disorders, Nutritional Problems, Irritable Bowel Syndrome (IBS), Pancreatitis, Inflammatory Bowel Disease (IBD), Fatty Liver Disease etc