Well, the transmitter arrived today, so at least I'm not going to have to yell at any more poor Dexcom C/S representatives. Nancy, that just sucks. I don't know how many times I've had something similar happen over the course of our 6+ years with D. And then people think you're a nagging shrew when you call back to confirm things that you've been told. I hope you get it all straightened out. Most insurance companies will cover another once you are out of warranty, so 6 months is normal, but as Monica said, it does vary some by insurance companies. Once our first transmitter went out of warranty, I ordered a new one immediately because I know there can be delays when you're involving a new prescription and the insurance company. I did not anticipate that transmitter dying at 4 months, but there's really nothing I could do about that.