push for this. The neuro specialist at the University that I saw said they rarely have a need for this anymore. The EMG/NCS testing, at least at teaching hospitals with practitioners who know what they are doing, are very diagnostic in terms of nerve damage and type (axonal or demylinating or both.) This is for long nerve fiber damage. Small nerve fiber damage usually can be seen from a skin punch biopsy. What neither one tells you is why the damage is occuring, in many cases. I think that is why people want the biopsy, but I have heard too many times that it is inconclusive. And the numbness it leaves behind, or sometimes pain, may not go away.