North Carolina: 132K people applied for Medicaid via HC.gov
This number out of NC is a bit squirrelly; I'm not updating the actual spreadsheet with it, but it's still worth at least mentioning:
Overall, Terrell said, the state has received 95,000 Medicaid applications via the federal ACA sign-up, representing 132,000 people, since October 2013. And that number is likely to grow.
The number of people added to Medicaid/CHIP in NC thru 3/01 via the HC.gov site was 55,691, so this could potentially be a more than 2.3x increase, but they're noted as applications, so presumably some of them will be denied. Still impressive.