Physician Directory - Specialty Descriptions Following is a list of physician specialties followed by descriptions. Once you find the specialty you are looking for, click on one of the following links to find a physician. - Find a physician by specialty. Find a physician by name. Using This Database: Click on the triangles on the Specialty Title Bar to toggle between ascending and descending sort order. Click on a blue triangle to expand or collapse that category. Specialty Description Gastroenterology is a medical subspecialty concentrating on the digestive organs involving the stomach, bowels, liver, and gallbladder. The Gastroenterologist treats conditions such as abdominal pain, ulcers, diarrhea, cancer, and jaundice. Gastroenterologists perform complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.  Expand | Collapse