I think your Doctor is telling a big one in hopes of getting him to seriously try the machine enough to get used to it.
i have one, i use it every night, there is a smart card in it that monitors my usage. (for the purpose of treatment)
my doctor read it once a year to see if i need to have the cpap pressure increased.
There may be something to do that in the latest machines to prevent a Smart Meter from shutting them down. Lots of data can piggyback on a 60Hz power feed.
Before the NSA started its domestic operations, that was how the FBI and other spooks could access your computer.