The one my wife uses is not WiFi, it's cellular. The insurance company required a certain percentage of use for the first year. The usage is still tracked by the doctor, but not the insurance company.
I’ve had one for a couple of years or more.
Other than the manufacturer bugging about new and overpriced parts, not a peep from insurance or the specialty clinic.
It has made such a difference. I had no idea that I was so messed up.