An estimated 9 million to 10 million people are covered by the Medicaid expansion, and many of the remaining uninsured are likely to be eligible if their states accept. Most of the new Medicaid recipients are low-income adults.Medicaid has traditionally carried a social stigma, and conservative critics say it’s no better than being uninsured. But studies have debunked that perception, showing that Medicaid eases financial burdens and provides access to needed medical attention. It can be less complicated for consumers than the subsidized private insurance that’s also offered by the health care law, which requires people to account to the IRS for their financial subsidies.The nonpartisan experts at the CMS Office of the Actuary wrote in their report that they were expecting costs to decrease in 2015. They had reasoned that uninsured people who were putting off care would sign up for Medicaid in 2014, the first year of expansion. The experts expected that pent-up demand would ease in 2015, and per-person costs would drop. But the opposite happened: Costs went up.