[Diabetes-Talk] dexcom question

[Louise Peyton]

Hello, all:
Since my insurance company has denied both my appeal and original request for a Dexcom 7, I'm considering buying it out of pocket using a coupon from the Dexcom website which covers most pharmacies including Amazon.  Since I am totally blind and have an IPhone, do I need the receiver, sensor, and transmitter?  Or, just the IPhone app and sensor?  How many sensors would I need for a 90 day supply?  Thanks.
Louise Peyton