Thanks for the info! FYI, I did some further investigating on my own and found out some helpful info. Right now, for a pregnant woman, the income limit is 185% of the FPL (federal poverty line) and (for maternity medicaid only) they do not look at your "resources" (savings, property, etc). If you are not married, they only look at your income - not your partner's, roommate's.
Unfortunately, however, a bill just passed the state Senate that would lower the limit to 133% - more info here: http://www.newsobserver.com/2013/05/29/2925430/nc-senate-budget-plan-pushes-pregnant.html It still has to pass the House, but it probably will, sometime in 2014. :-( I'm not sure if women between 133% and 185% would be kicked off or grandfathered in at that point.
However, at the same time, by then the new "no closed door" policy will have been enacted (part of healthcare reform), meaning that if you don't qualify for Medicaid, instead of being turned away, you will instead be directed to a BYO healthcare plan. And since pregnancy will no longer be considered a pre-existing condition, you can purchase your own insurance, and you will be able to get financial assistance from the federal government in paying premiums, copays, etc - more info here: https://www.healthcare.gov/. Unlike now, in which if you get turned down by Medicaid, it is too late to buy insurance. Ugh.
Whew!! So complicated!