To what age does Medicaid still cover?

Both are correct in certain situations. Here is the Virginia Medicaid Handbook. It covers:

Children ages 6 to 19, whose family income is at or below 100% of the Federal Poverty

Income Guidelines;

Children under age 21 who are in foster care or subsidized adoptions.

So it covers you until 21 i you are in foster care or involved in a subsidized adoption. Otherwise to 19.

http://townhall.virginia.gov/l/GetFile.cfm?File=C:...