It's called Medicaid expansion under Obamacare. The feds pick up 100% of the additional costs for those Medicaid applicants become eligible under the new rules of 138% of poverty levels for three years and 90% until 2022. Of course with the federal government bankrupt, there is no guarantee that the rules won't be changed if the feds don't have the money.
What they are finding under Obamacare is that the number of those enrolled under Medicaid has increased both under the old criteria and the new criteria. As a result of those who would have been covered without the expanded Obamacare criteria, the states must pick up about 50% of the costs as they do now for those covered under the old rules.
And guess what, the federal taxpayers pick up the tab. There is no free lunch.