I thought of this possibility but it turns out it keeps thinking I'm living in my old apartment from 5 years ago. Would identity theft do this?

Hi! Yes, Mass Health confirmed my address with me on the phone on January 17th and said it matched and everything looked good, and that I shouldn't have any issues. I just went on Health Connector, however, and my address has been changed to my apartment in California that I haven't lived in or been to since 2018 and I'm no longer eligible for Mass Health. So that's cool. I'm currently on hold for an hour with Mass Health to figure out why this is happening.. I have an eye appointment on Thursday too. :)

Ty for the info though, looks like something on their end got messed up somehow.. I'm more angry that they said it was fine when it wasn't and now I'm out of insurance...