Emergency Room - Marian Regional Medical Center is an emergency room that offers many services, including emergency care, a STEMI heart attack center, and a primary stroke center. Visit Emergency Room - Marian Regional Medical Center located at 1400 E Church St, Santa Maria, CA. This Santa Maria emergency room is one of the best in California. As part of the Dignity Health network, Emergency Room - Marian Regional Medical Center is dedicated to delivering high quality, compassionate care and access to Santa Maria and nearby communities.