sentences:  UW Health also has an affiliated insurance company, Quartz Health Solutions, Inc., operated in partnership with UnityPoint Health and Gundersen Health System.UW Health serves over 600,000 patients per year, and employs over 1,500 physicians and 16,500 staff across six hospitals, making it the second-largest employer in Madison (after UW–Madison) and in Wisconsin.UW Health University Hospital is home to a helipad that serves UW Med Flight, the hospital's air ambulance service.