I believe it is up to the neurologist and as to what your diagnosis is. It all seems to factor in.

As for a person who has CMT we know that it is progressing and we do not need to have another EMG/NCV. A neurologist who knows CMT told us that. In the case of someone with CMT, EMG/NCV tests are more for the doctor's benefit. Of course, if a CMTer is looking to get on SSDI that is another case.