The Sisters of Mercy Health System consists of 18 acute care hospitals, a heart hospital, outpatient care facilities, physician practices, skilled nursing and long-term residential care facilities, clinics, a managed care organization and other health-related services. Mercy is the 9th largest Catholic healthcare system in the U.S., based on net patient service revenue.

Huntsville Hospital is one of the largest locally owned not-for-profit hospitals in the nation with 881 licensed acute care beds. As a teaching facility for the University of Alabama-Birmingham's School of Medicine and Family Practice Residency Program, Huntsville Hospital helps train family physicians for communities throughout Alabama and beyond. In 2009, for the eighth consecutive year, Huntsville Hospital has been awarded National Research Corporation's Consumer Choice Award.

For more than a century, Johns Hopkins has been recognized as a leader in patient care, medical research and teaching. Today, Johns Hopkins Medicine is known for its excellent faculty, nurses and staff specializing in every aspect of medical care. The Johns Hopkins Health System includes four acute-care hospitals and programs for local, national and international patient activities. For the 19th consecutive year, The Johns Hopkins Hospital has earned the top spot in U.S. News & World Report's annual rankings.

As the third-largest medical center in the St. Louis metropolitan area, St. Anthony's serves families in Jefferson County, Missouri, and St. Clair and Monroe counties in Illinois. In addition, St. Anthony's operates four urgent care facilities - located in Arnold, Fenton, Lemay and Big Bend.

UPMC is an $8 billion integrated global health enterprise headquartered in Pittsburgh, Pennsylvania, and one of the leading nonprofit health systems in the United States. As western Pennsylvania's largest employer, with 50,000 employees, UPMC is transforming the economy of the region into one based on medicine, research and technology.