Hello maine and welcome to NeuroTalk. Your son has alot on his plate. Wow!
Well, I will tell you my experience w/Mayo-Rochester. I went online, found the #, asked to be connected to Neurology on a Thurs and they told me to be there Tues 8am. I was beyond shocked.
I will tell you that the morning I arrived, a few people came in w/o appts, so were told to sit down and wait. There were no guarantees that they would be seen. I don't know if it's based on a cancellation or what.
I did see one of the people the next day, so know that it worked for that person. I also know a person that just went out there w/o an appt. She said it took almost 3 days, but she got in and had 3 days of tests. That's all I really know about it. And, I don't know if insurance has any bearing on it or not.
I hope you can find some help for your son and I'm glad you found us, as you are now part of a huge, caring community here. Good luck.