>However, sometimes it becomes unavoidable. After a recent diagnosis with sleep apnea, I got a cpap machine, which has a cellular network connection in it, which connects to a centralized service where the sleep technicians can tune the device to deliver the right pressure for my sleeping patterns.

I too have such a device. I did a little (<5 minutes) research and was able to access the device's settings to disable the cellular modem.

The manufacturer complained about this to me and I told them to go fuck themselves. My insurance company never even asked about it.