 Sanford Health, based in Sioux Falls, and Marshfield Clinic Health System, serving patients in rural Wisconsin and Michigan's Upper Peninsula, are merging. The combined nonprofit will bring together pharmacies, 56 hospitals, two health plans, and around 4,000 health care providers to expand access to specialty care and improve patient outcomes. The merger between Sanford Health and Marshfield Clinic Health System is expected to close at the end of the year.