Spread of Medicare Accountable Care Organizations in Rural America.

Purpose: This RUPRI Center data report describes Medicare accountable care organization (ACO) growth in non-metropolitan U.S. counties from 2016 to 2017. This data report, which includes data through December 2017, follows a similar analysis released in October 2016 that described ACO trends from 2013 to 2015. Key Findings: The following findings are based on activity through 2017: (1) Medicare ACOs operate (an ACO provider is present) in 60.3 percent of all nonmetropolitan counties, up from 41.8 percent in 2016, (2) As of December 2017, no nonmetropolitan ACOs were participating in ACO models that included downside risk (meaning they are liable for expenditures exceeding a benchmark).