Information regarding Mayo Clinic and Medicare
See Medicare and Medical Assistance (Medicaid) policies here on Mayo Clinic's website: https://www.mayoclinic.org/patient-visitor-guide/billing-insurance/insurance/accepted-insurance/medicare

Mayo Clinic accepts new Medicare patients. Mayo Clinic is one of the largest Medicare providers in the country. Unfortunately, Mayo Clinic can’t honor all requests they receive from Medicare patients who want to come to Mayo Clinic. Medicare patients are accepted in all practice areas where there is capacity (appointments available) to accommodate them and most importantly, as the medical needs of these patients require.