Mayo Clinic Hospital — Rochester, Saint Marys Campus is one of two hospitals in Rochester, Minnesota operated by the Mayo Clinic. Together with the Rochester Methodist Campus they form Mayo Clinic Hospital — Rochester.
In January 2014, Saint Marys and Rochester Methodist were consolidated under the name Mayo Clinic Hospital-Rochester. However, Mayo will continue to operate both campuses under their current names, despite being a single, licensed facility. Mayo Clinic Hospital-Rochester has a combined total of 2,059 certified beds and 96 operating rooms, making it one of the largest hospitals in the world.
The hospital was founded in 1889 by a local Franciscan religious community, the Sisters of Saint Francis of Rochester, Minnesota, led by Mother Alfred Moes, with encouragement from Dr. William Worrall Mayo. Five buildings at the Saint Marys Campus are named to honor Saint Marys' foundress and first administrator, Mother Alfred, and four Sisters who previously served as hospital administrators: Sisters Joseph, Domitilla, Mary Brigh and Generose. The Francis Building honors the many Franciscan Sisters who have served since the founding of Saint Marys.
Originally, the name was spelled "Saint Mary's Hospital", as can be seen in stone above the old front entrance, but in recent years the apostrophe is usually omitted.
Today it is a large hospital campus with 1,265 licensed beds and 55 operating rooms, making it the largest privately operated hospital in the nation. In 2008, there were 43,000 admissions as well as 28,000 surgical cases. The Mayo Clinic Psychiatry and Psychology Treatment Center in the Generose Building is also part of the campus. St. Marys Hospital campus includes the nation's largest intensive care unit which includes 200 ICU beds and 200 "step-down" ICU beds.
Recently the Emergency Department and Post Anesthesia Care Unit were renovated.
The hospital is currently accredited as a Level I trauma center and stroke center. It is the seat of the Southern Minnesota Regional Trauma Advisory Committee, serving a population of almost 900,000.