Washington Gastroenterology is the largest gastroenterology practice in Washington State, with locations from Edmonds to Olym ... pia, over 40 Board-Certified Gastroenterologists and 20 Non-Physician Providers. Washington Gastroenterology effectively treats patients in 12 clinic locations, as well as performing outpatient endoscopic procedures , including upper endoscopy and colonoscopy, in our Ambulatory Endoscopy Centers. In addition to offering comprehensive gastroenterology services, Washington Gastroenterology is active in clinical research, helping to advance the science of gastroenterology, resulting in improved overall patient care. The providers and staff at Washington Gastroenterology are united in our commitment to excellence in patient care and an enhanced patient experience. read more