Almost one in five people are uninsured in states that have not expanded Medicaid coverage. A recent report from the Urban Institute shows that states which have opted to expand Medicaid coverage show higher rates of insured residents than states that have opted not to expand coverage. The Affordable Care Act gave states this right and substantial funding for this expansion.At the end of June 2014, states that had expanded Medicaid coverage had a 10.1 percent uninsurance rate. States that had not expanded Medicaid coverage had an 18.3 percent uninsurance rate. Overall, 13.9 percent of adults are uninsured.
As of the end of November 2014, twenty-eight states are expanding Medicaid coverage, including the District of Columbia. California, Illinois, New York, Pennsylvania and Ohio are all expanding coverage. Florida, Texas, Nebraska and Georgia are among the states that have not expanded Medicaid coverage to date.