I have used the Medtronic pump for many years,and the corresponding sensor. I was fine with the pump, the the CGM was NOT accurate, so 3 mos. ago I switched to the newest Dexcom sensor and was amazed with how accurate it is! I absolutely love it. When my insurance will approve a new pump, the t slim with the integrated Dexcom will be my choice. (It is not available yet).
I still use my Medtronic pump with the Dexcom, and honestly, I miss the convenience of having it all integrated in one system, but the accuracy of the dexcom is so good, that it’s worth having to devices on me, as unbelievable as that might sound!
If your doctor won’t approve it, get another endocrinologist to write you the prescription, the tandem rep can tell you of a doc in your area that will approve it.
Then after you have it, you can stay with the new doc, or ask your current one to continue following your diabetes.
There is no medical reason for your doc to deny it. It’s probably just new and he doesn’t know much about it.
What state do you live?