I'm currently reading "Peripheral Neuropathy: When the Numbness, Weakness, and Pain Won't Stop" by Norman Latov and he confirms what you just said. Since my wife's current neurologist didn't know to perform a skin biopsy we're now considering changing to a neurologist that specializes in PN. The only problem is that he's about a 2.5 hour drive instead of the 10 minutes to our current neuro.

Any advice on whether we should drive five hours round trip for a neuro who knows more about PN, or stick with our local neuro who's already exhausted the options he knows about (but is willing to work with any more info we bring him from sources like this forum).