@noteworthy Keep on advocating for yourself until you get a diagnosis. If this is a nerve problem, it can be a problem anywhere along a nerve path from the brain to the hand causing an issue. They may also check for a brain issue. Spinal tumors can put pressure on the spinal cord. Imaging like an MRI would be the way to look for these. You can also request an appointment at one of the other Mayo campuses which of course involves travel costs. It is normal to have to wait for an appointment at Mayo. Did you send in records and ask for a review in requesting an appointment? That's the usual way to get an appointment. If not at Mayo, go to the best place you can. If you need surgery, you want to be where really good surgeons work.

Do you have a primary care doctor helping you to find specialists for consultation?