Obstetrics Clinic (Mary Hilton Maternal Child Medical Clinic) - St. Mary Medical Center - Long Beach offers many services, including breastfeeding assistance, pregnancy testing, and prenatal testing. Visit Obstetrics Clinic (Mary Hilton Maternal Child Medical Clinic) - St. Mary Medical Center - Long Beach located at 529 E 10th St, Long Beach, CA. As part of the Dignity Health network, Obstetrics Clinic (Mary Hilton Maternal Child Medical Clinic) - St. Mary Medical Center - Long Beach is dedicated to delivering high quality, compassionate care and access to Long Beach and nearby communities.