Change Healthcare President and CEO Neil de Crescenzo rings the Nasdaq closing bell to mark the Nashville, Tenn.-based health care technology company’s entrance onto the public market. Change Healthcare provides hospitals and other health care industry players with data analytics and other tools to improve the billing and payment process, boost patient engagement and drive better clinical decision-making. The company was formed in 2017, and achieved significant growth in two years, expanding to 14,000 employees serving 30,000 customers.