The expansion of Medicaid eligibility to most individuals with incomes below 138 percent of the poverty threshold is a provision of the 2010 Affordable Care Act. In June 2012, a Supreme Court ruling made Medicaid expansion optional for states. Among all states, Kentucky had the largest drop in the percent uninsured, from 14.3% in 2013 to 8.5% in 2014. The drop in Tennessee was only from 13.9% to 12.0%. Kentucky’s results were due to an expansion of Medicaid as well as outreach efforts and a successful online registration system, Kynect.
"Characteristics of the Uninsured in Tennessee, 2013-2014,"
Tennessee Medicine E-Journal: Vol. 2
, Article 5.
Available at: http://ejournal.tnmed.org/home/vol2/iss3/5