Actually you can still see a primary doc that doesn’t take Medicare. You pay for your visits out of pocket and then the doc bills Medicare for you. Medicare then sends you a check for the amout they will pay for the visit.
My doc stopped taking Medicare years ago and that is how she explained it to me.
My parents (in their 70’s) used to go to a different Mayo Clinic here in Phoenix and they were told way back in the spring that Medicare would no longer be accepted, so I’m not sure if this is old news that is just getting picked up or just a different facility. They have gone with a doc who charges an annual fee for all sorts of high-end care. My dad has even called her at home - she’s available to them at all times. Her goal was to take fewer patients who could pay her rates while drastically improving the quality of the care she gives. They seem really thrilled with her, and I like her because she has recommended they cut back some of their prescriptions that seemed unnecessary to me.