CMS Data Show Medicare ACO Programs Generated $237 Million In Savings During First Year On January 30, 2014, the federal Centers for Medicare & Medicaid Services (CMS) announced that Medicare accountable care organization (ACO) initiatives generated savings of $273 million during the first 12 months in operation. About half (54) of the 114 Medicare Shared Savings Program ACOs that started operations in 2012 had lower expenditures than projected. Of the 54 Shared Savings Program ACOs that exceeded their benchmarks, 29 generated savings of more than $126 million. The 32 Medicare Pioneer ACOs generated gross savings of $147 million in their . . .