I had similar hassles with my insurance and Edgepark. I documented everything in writing (emails) to the insurance company, called multiple times, etc. and finally convinced the insurance company to allow me to order Dexcom supplies at pharmacy. The way I convinced them was by documenting that they were faxing prior auth paperwork to each other using “wrong fax numbers” and I was being promised quick resolution over the phone with zero follow through at both the insurance company and Edgepark. After about a month of this I was called back by the pharmacy benefits manager who offered to set things up with my pharmacy for ordering Dexcom and I jumped at that offer. For contract reasons, they would not allow me to order direct from Dexcom for DME. While I was still hassling with Edgepark, my insurance offered Byram but I did not want to try them because I suspected that my problem was caused equally by my insurer and my DME supplier and did not think a switch to Byram would solve it.
Insurance still covers as DME benefit when I order at pharmacy (deductible and copay still applies). I have to call the insurance pharmacy benefits dept. before each order, they call the pharmacy and enter an override into the system, and then I call my pharmacy and the orders sail through. This is still a bit of a hassle but is worthwhile for me. The pharmacy pricing is much lower than Edgepark and I am saving money on my 20% co pays.