The kind of doctor who treats diverticulosis is a gastroenterologist, according to the American College of Gastroenterologists. Gastroenterology is the specialty that studies and treats the gastrointestinal tract, from the esophagus to the rectum, as well as organs involved in digestion, including the pancreas, gall bladder, bile ducts and liver.
Diverticulosis is the development of pouches or sacs in the gastrointestinal lining, states the ACG. The sacs, called diverticula, tend to develop primarily on the lower intestine's left side. While diverticulosis is associated with no symptoms, people who have developed diverticula may experience abdominal pain. Inflammation or infection of the diverticula is called diverticulitis.