IHPI Director Dr. John Ayanian and IHPI members Dr. Richard Hirth and Marianne Udow-Phillips have penned a piece for Health Affairs outlining the Medicaid expansion experience in Michigan. As of July 2015, 30 states and the District of Columbia have expanded or planned to expand Medicaid under the Affordable Care Act (ACA). Michigan is one of only six states with a fully Republican-led state government to expand the program. The Healthy Michigan Plan (Michigan’s version of the Medicaid expansion) went into effect on April 1, 2014. One year into this expansion, Michigan’s experience has confirmed some expectations but vastly exceeded others.