The Centers for Medicare & Medicaid Services (CMS) today announced the 2015 performance year results for the Medicare Shared Savings Program and the Pioneer Accountable Care Organization Model that show physicians, hospitals, and health care providers participating in Accountable Care Organizations continue to make significant improvements in the quality of care for Medicare beneficiaries, while achieving cost savings. Collectively, Medicare Accountable Care Organizations have generated more than $1.29 billion in total Medicare savings since 2012.