A centerpiece of the Patient Protection and Affordable Care Act—often referred to as “Obamacare”—is the expansion of Medicaid eligibility to people with annual incomes below 138 percent of the federal poverty level, or $26,347 for a family of three and $15,417 for an individual. Despite the fact that the Affordable Care Act was passed into law in 2010 and was subsequently upheld by the U.S. Supreme Court in the summer of 2012, many questions persist about the law, particularly as it relates to Medicaid expansion—what that expansion actually means, who it will cover, what it will cost, and more.