WHITE PLAINS, N.Y.--(BUSINESS WIRE)--Universal American Corp. (NYSE:UAM) announced today that more than 120 Maryland primary care providers have formally come together to improve patient care, reduce overall healthcare costs, and embrace the changes resulting from healthcare payment reform. Together these providers will partner with Collaborative Health Systems, a Universal American company, to form Chesapeake Independent Physician Association (IPA). The Chesapeake IPA is a physician-led Maryla