EMG/NCV testing should be able to tell if you have CMT 1 or CMT2. That is if you might have those types of CMT. However, it will not give you the sub type and there are many sub types both under CMT 1 and CMT 2. That is where DNA blood testing would tell you; the sub type. It is expensive.

As I posted, family history would also be of help along with an expert neurologist who knows CMT.

Hope you find an answer.