How they work: Generally considered more flexible than their Medicare counterparts, private ACOs are experimenting far more with a variety of payment, risk and care coordination models under individual agreements between payers and care groups.
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April 2013To learn more: Salt Lake City-based Leavitt Partners is tracking ACOs and has established a Center for Accountable Care Intelligence: leavittpartners.com/accountable-care-organization-intelligence.
*All tallies are current as of March 19, 2013.