Hi Bruce. This is Harvey. On this site I am known by my initials hbp. We have a lot in common. I am 75, I lived and practiced law in Phoenix for 50 years ( now live on the beach in southern CA ). Many of my clients were doctors and my son was in the medical field ( he quit as he was upset with the managed care staffed by lay people ). Most of the time that I have been on Medicare I was in an advantage plan but I recently was able to change that to a Medicare supplement, which is far better for me considering my advanced, aggressive CR, cancer. If I were in your city and your situation I would consider the following.

1. In September speak to a Medicare insurance agent, ( I had a very knowledgeable agent there but I forgot his name). See if you can up your plan to a Medicare supplement that you might use at Mayo.
2. Mayo is world class and if I were still in Phoenix I would do all thatI could to go there. Banner would be my second choice.
3. Not all Banners are equal. I would research the doctors that might treat you at Banner and then see where they practice. You want to check where they graduated from, where they did their residency, how long they have been at Banner, their age (not too old and not too young). My prejudice is that doctors want to work reasonably close to their home and work with other staff that they respect. I would probably look closely to Banner in Scottsdale or mcDowell in Phoenix.
3. If you are going to have surgery, having surgery at the facility that handles the most and with a surgeon that has many surgeries per week, would be my preference.
4. Talk to your surgeon about the wisdom of getting in a clinical trial

Best of luck to you!