Founded in 1872, SSM is the third largest Catholic health care organization in the United States. SSM operates care delivery in four states: Wisconsin, Illinois, Missouri and Oklahoma. With more than 1,300 employed physicians and nearly 30,000 employees in four states, SSM is one of the largest employers in every community it serves. An early adopter of the electronic health record (EHR), SSM is a national leader for the depth of its EHR integration.

With the St. Louis region, SSM operates six adult hospitals, one rehabilitation hospital and one children's hospital. Recognized as a value-based, premium quality leader in the provision of health care services, SSM contributes 154 primary care physicians and 191 specialty physicians to GQPA.