you might want to read some of these posts
https://forum.tudiabetes.org/topics/best-medicare-supplement-plans-for-diabetic-on-pump-and-cgm
http://www.tudiabetes.org/profiles/blogs/how-i-got-my-cgm-through-medicare
http://www.tudiabetes.org/profiles/blogs/urge-medicare-to-cover-the-cgm
http://www.tudiabetes.org/group/dexcomusers/forum/topics/cgm-insurance
https://forum.tudiabetes.org/topics/hr3710-medicare-cgm-coverage-act
http://www.tudiabetes.org/video/tudiabetes-live-interview-medicarecovercgm-panel-discussion
and you might want to join this group
http://www.tudiabetes.org/group/cgm-advocacy