Providence St. Mary Medical Center in Walla Walla, Washington, is a regional leader in quality, safety and customer service, whether you are coming in for a simple test, are considering surgery or are welcoming a new baby into your family. We have some of the region’s top physicians, technology, staff and expertise. St. Mary is one of only seven hospitals in the state of Washington that has earned a five star rating for quality from the Centers for Medicare and Medicaid Services. It also has earned top ratings for patient safety from Healthgrades.