“After 3 years of the MSSP, participation in shared-savings contracts by physician groups was associated with savings for Medicare that grew over the study period, whereas hospital-integrated ACOs did not produce savings (on average) during the same period. (Funded by the National Institute on Aging.)”
– Medicare Spending after 3 Years of the Medicare Shared Savings Program –9/20/18

“Shorter interventions can improve ACO performance—use of embedded care coordinators and local, regional health information systems; timely feedback of performance data. However, longer term interventions are needed to promote physician–hospital collaboration and skills of physician leaders. CMS and other stakeholders need realistic timelines for ACO performance.”
– Factors That Distinguish High-Performing Accountable Care Organizations in the Medicare Shared Savings Program – Health Services Research February 2018