Surgical Weight Loss Department - St. Mary Medical Center - Long Beach offers many services, including informational seminars, gastric bypass, and sleeve gastrectomy. Visit Surgical Weight Loss Department - St. Mary Medical Center - Long Beach located at 1050 Linden Ave, Long Beach, CA. As part of the Dignity Health network, Surgical Weight Loss Department - St. Mary Medical Center - Long Beach is dedicated to delivering high quality, compassionate care and access to Long Beach and nearby communities.