You are asking some good questions. I do encourage you to call the Phoneix campus and inquire about billing for Medicare at their facility. I have heard from others who have gone to the Phoenix campus that Medicare was not accepted, but I think that if you are resident of Arizona, it might be covered, but you need to call to be sure. Will you be living in Arizona or in a nearby state?
Here is the number for the Phoenix campus, call and ask about billing Medicare, Telephone requests, Mayo Clinic in Arizona, 800-446-2279 (toll-free).
I hope that your move goes well. I'm sure you will enjoy the sun!