The Medicare Shared Savings Program (MSSP) was launched in 2012 in order to test the effectiveness of value-based care models in reducing costs and improving outcomes. Currently, 561 Accountable Care Organizations (ACOs) participate in the program, covering more than 10.5 million beneficiaries. Combined, these ACOs saved roughly $2 billion between 2012 and 2016. The ACOs with the greatest savings and the highest number of covered Medicare members in 2016 can be found in the following lists.

Most of the ACOs with the greatest earned savings spent well below their target benchmark. The median savings rate, or the percent difference between actual spending and an ACO’s assigned benchmark, was more than 6 percent for all ACOs that shared savings, which is lower than 6 of the top 10 ACOs on the list. Bigger ACOs, such as Advocate Physician Partners Accountable Care, didn’t have as much of a savings rate but made the list because of their large patient volume and associated reductions in spending.

However, having a larger beneficiary pool and presumably, the existing infrastructure to manage significant numbers of patients, does not notably increase the likelihood of sharing in any savings. Though the minimum qualifying savings rate grows smaller for progressively larger organizations under CMS guidelines, only 2 of the top 10 largest ACOs by patient population had shared savings in 2016.

To learn more, download the Definitive List: Top MSSP ACOs by filling out the form.