- Welcome Gastrointestinal Specialists, Inc. is an eleven physician single specialty gastroenterology practice serving central Virginia, including the Richmond Metropolitan and Tri-Cities areas, encompassing a population of approximately 1.5 million people. This territory includes the counties of Henrico, Hanover, Goochland, Chesterfield, Dinwiddie, Charles City, Prince George, King William, and ...www.gastrova.com