Medicare savings reported in the early years of the Medicare Shared Savings Program are not coming from reduced hospitalizations of high-risk Medicare patients or even through better coordination of care for those patients.
Instead, Medicare accountable care organization savings are coming mostly from better and more coordinated care for low-risks Medicare ACO participants.
These surprising findings are reported in the article “Medicare ACO Program Savings Not Tied To Preventable Hospitalizations Or Concentrated Among High-Risk Patients,” which can be found in the December 2017 edition of the journal Health Affairs. Find a link to that article here.