The Mayo clinic does not accept Medicare according to a friend who has talked with the people at the facility located close to his home about specialist surgery as well as routine medical care. In addition to Medicare he has a supplemental policy that pays 20 percent.
If you have a different experience please post with suggestions for how a person with Medicare might use their services.
The story we hear is that Mayo doctors aren't at risk of doing whatever brings in the most bucks individually because they are on straight salary. Apparently, though, that doesn't stop the clinic from getting whatever the market will bear for their service.