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The Medicare Shared Savings Program, or MSSP, is the largest ACO program in Medicare with 10.3 million beneficiaries covered by almost 480 ACOs.
Participating ACOs receive a portion of the savings they generate compared to a benchmark, while ACOs with spending exceeding the benchmark might have to pay a penalty. The goal is to improve outcomes and lower healthcare costs by incentivizing providers to better manage patient care.
In 2024, 75% of ACOs participating in MSSP achieved savings totaling $6.5 billion, according to the CMS. In comparison, ACOs saved $5.2 billion the year prior.