Gastroenterology Pro Association 21 Clark Way Somersworth, NH 03878 Phone : (603) 692-2228 Gastroenterology Pro Association Business Category Physicians & Surgeons-M.D. Physicians & Surgeons-Gastroenterology Gastroenterology Professional 21 Clark Dr Portsmouth, NH 03801 Phone : (603) 692-2228 Business Category Physicians & Surgeons-M.D. Physicians & Surgeons-Gastroenterology