CMS announced Monday (May 4) that for the first time it is using authority under the Affordable Care Act to expand a demonstration, called the Pioneer Accountable Care Organization Model, even though many Pioneer ACOs dropped out of that demo. CMS' actuary reports Pioneer ACOs saved Medicare $384 million in its first two years. “The Actuary’s certification that expansion of Pioneer ACOs would reduce net Medicare spending, coupled with Secretary Sylvia Mathews Burwell’s determination that expansion would maintain or improve...