Gastroenterology Department - St. Mary Medical Center - Long Beach offers many services, including gastroenterology, endoscopic retrograde cholangiopancreatography (ERCP), and esophagogastroduodenoscopy (EGD). Visit Gastroenterology Department - St. Mary Medical Center - Long Beach located at 1050 Linden Ave, Long Beach, CA. As part of the Dignity Health network, Gastroenterology Department - St. Mary Medical Center - Long Beach is dedicated to delivering high quality, compassionate care and access to Long Beach and nearby communities.