She's 30 or 31, and is in the U.S. as a student, I believe; she said she does have medical insurance. I know she's had surgery for her endometriosis at least twice before, possibly more, but not in the U.S. She doesn't want to have kids, so post-treatment fertility isn't a concern for her, but I don't know if/what BC she may be on, or have bad reactions to. (If there's anything really important that would help with finding resources, I can ask her tomorrow!)
She has a friend with worse English who has the same condition, and who probably needs more general information about the American health system; I'm not much help, unfortunately, since aside from sinus infections I'm pretty healthy and have never really had to be insured for anything that's not "sudden and unexpected million-dollar catastrophe".
Thank you all SO MUCH; I'm really out of my depth, here, but I hate to leave a friend hanging!