Yes, I had one done. It was at the same time as my sural nerve biopsy. It was soleous (spelling?) muscle and sural nerve. I have a 5 inch scar on the back of my leg. No big deal. I had mild nonspecific atrophy in the muscle but the nerve biopsy clinched the CIDP.

It was painful for about 5 days to the touch and if I bent my ankle or foot the wrong way. Im about 2 months out now and it doesn't bother me at all - I can run, jump, etc. However, I am numb on the side of my foot, but I am now used to it.