Good luck with Mayo I contacted them and faxed all my tests to them. I was told to give them 4-6 weeks I’m glad they responded quicker but disappointed they reviewed everything that day and mailed a basic letter on Friday and I got it on Monday. Being a highly recommended facility and knowing I’ve been to 3 additional Surgeons after my failed back surgery. I was praying for at least some suggestions but no all I got was a denial letter. I called and they said if I had a doctor write them they would look at it again. Why not tell you from the get go you need a referral!