While I may not have all of the answers for you, this is what I have done and am doing:
First, I am a retiree, have Medicare as my primary coverage,Ca BCBS as my secondary, and, until recently got my CGM supplies from Liberty Medical.
Second, while you may not be in this boat … I had been a Dexcom G4 CGM user for the past 2 years. I meet all of the requirements for the therapeutic (rather than adjunctive) Dexcom G5 that is now being covered by Medicare. To the best of my knowledge, Dexcom is the only CGM that has yet been designated a therapeutic CGM and, as a result, is now Medicare-eligible. I have to assume that the other CGM manufacturers are working overtime on getting their units similarly approved at therapeutic CGM devices. Note: I believe, however, it is true that some people that currently use CGM may NOT necessarily qualify as being eligible for Medicare coverage of their CGM.
However, prior to all of this, I was also finding it difficult to find a CGM supplier that would go through the process of getting a Medicare denial and was also an “in network” provider as far as Ca BCBS was concerned. At that time, however, although it took me a couple of phone calls, I found that Ca BCBS was quite helpful in finding a supplier that was capable of both getting a Medicare denial and of qualifying as an in-network provider. Ultimately, Ca BCBS found Liberty Medical for me …of course, that was a year ago and no longer relevant. However, at that time, Byram Healthcare was in the process of getting approved to distribute CGM supplies both in terms of getting Medicare refusals and then qualifying as a Ca BCBS provider.
While I realze that Ca BCBS is not the same as Fed BCBS, I would first suggest that you contact Fed BCBS. I found my BCBS to be quite helpful in tracking down a legitimate CGM supplier. They were sympathetic to my reasoning: CGM is a covered benefit under my Ca BCBS plan … but I can’t find an in-network provider that can also get a Medicare denial. When BCBS calls a supplier, they seem to get further than those of us who are merely customers. If your BCBS covers CGM but you can’t find an in-network provider, then I would ask them to help you find a suitable supplier …
Best of luck … all of this insurance stuff takes a lot of time and effort. That said, I consider myself to have had supplemental coverage that DOES cover CGM … and now to be eligible for primary coverage under Medicare.