Plaza Health Center - Closed is a outpatient services center that offers many services, including family medicine, internal medicine, and pulmonology. Visit Plaza Health Center - Closed located at 525 E. Plaza Dr., Santa Maria, CA. This Santa Maria outpatient services center is one of the best in California. As part of the Dignity Health network, Plaza Health Center - Closed is dedicated to delivering high quality, compassionate care and access to Santa Maria and nearby communities.