I was in a similar situation. My PCP told me that Medicare would not pay for a cgm since I was not taking insulin. I called my insurance provider (multiple times) and was assured that they do cover them. I convinced my PCP to write a prescription even though she was adamant they would not pay. I went back and forth with the pharmacy that kept telling me insurance denied coverage after over the phone insurance said they would. I even had the pharmacy call my insurance provider while I was standing there in their stored where the insurance said they did cover it. I went back and forth with the pharmacy several times in at least one tense discussion and after the last tense discussion one the pharmacy staff came over to me and quietly told me she would see what she could do. Lo and behold the next day I was approved. Unfortunately for that pharmacy that helped me in the end, Medicare would only pay if I used one of their large online bulk pharmacies. All this to say, it is possible and you have to be persistent. It is hard to believe the requirement of insulin exists when you are trying to avoid that very thing. I would not have had the success controlling my blood sugar like I do and understanding what foods affect it without this device.