Emdeon, a Nashville-based revenue cycle management and health IT solutions company, will purchase Brentwood-based Change Healthcare for $135 million, the companies announced today. The deal, expected to close later this month, also includes additional contingent payments of up to $50 million based upon Change's attainment of financial performance objectives by the end of 2017, according to a news release. Change Healthcare, founded in 2007, offers cost transparency and consumer engagement tools that employers and health plans can use to reduce health care spending. "Our customers are prioritizing information, insights and capabilities that enable individuals to be better healthcare consumers," Neil de Crescenzo, Emdeon president and CEO, said in the release.