I went through tests for PN at Mayo, Northwestern and UNMC with no definitive diagnosis. Mayo had a genetic test done and found several things that might indicate that it was inherited. I don’t have pain or pins and needles just numbness. We tried Gabepentin and it had no effect on the PN but lots of undesirable side effects so I quit that. The best thing I did was to get involved in the Foundation for Peripheral Neuropathy as they provide lots of suggestions for living with PN and not stressing about it. And many thanks to Dr Dyke and the fabulous staff at Mayo for finally coming to a conclusion