I see that you are doctoring with Mayo. I am almost positive that they have people in place that can help you through the insurance stuff and may be able to communicate with your insurance prior to get the approval. We doctor at Mayo too and I know that somewhere in their huge maze of information I saw something about this. I am guessing you are being seen through Gonda Vascular Center-right? My daughter hasn't been apart of the center but has seen doctors that work there. She is seen on the pediatric floor instead. Just a suggestion.