Interesting that they say they rule out MS first. Because MS is usually diagnosed by ruling everything else out first. I had an MRI first, and it even showed lesions, but further testing hasn’t shown a for sure diagnosis of MS or anything else for that matter. I have ruled out a whole bunch of things, through bloodwork, 3 EMGs, spinal tap, skin biopsy, etc so those tests are valid for finding a source of neuropathy and at least some of them are cheaper than MRIs (I don’t remember all of the costs). I hope you can get a good second opinion. There are so many things that can cause neuropathy - some are pretty easy to find and don’t need a MRI. Good luck!