 EDEN PRAIRIE, Minn. NASHVILLE, Tenn.--BUSINESS WIRE--Optum, a diversified health services company and part of UnitedHealth Group NYSE: UNH, and Change Healthcare NASDAQ: CHNG, a health care technology leader, have agreed to combine. Change Healthcare will join with OptumInsight to provide software and data analytics, technology-enabled services and research, advisory and revenue cycle management offerings to help make health care work better for everyone. 