Amy, just a quick FYI, I have NHP (MassHealth) and they are covering 100% of my CGM costs (just got my Dexcom in the mail today). I also go to Joslin, and I believe all my endo had to do was fill out a prior authorization form, BUT as a note, Dexcom does NOT have a contact with NHP (or any MassHealth program I think). I had to go through a third party company that Dexcom referred me to, but I had no idea that MassHealth prefers third party vendors and had been paying out of pocket for pump supplies through Animas beforehand...had I known I would have saved a significant amount of money in the last few years :(
Message me if you want the name of the third party supplier (I don't want to advertise on here and I can't necessarily vouch for them other than the fact that I got the CGM and the first 3 months of supplies for nothing). Good luck getting your CGM! Joslin is big on getting us on them, so I'm sure they'll help you get it any way you can.