Scam. Sent them my MRI, "Oh, you're a great candidate, and of course Medicare will pay." Made appointment, which was fortunately to a location within driving distance. Two days before surgery, I got a call telling me to bring $30K in cash or $35k availability on credit card. Medicare, they now say, will not pay. Oh, and by the way, they're going to want to do another MRI. That finished me. I'm done - and grateful to have stepped aside from what is obviously a trap.