What is best treatment for chronic inflammatory demyelinating polyneuropathy? Please advise the name of doctor in orange county ny.

IVIG by far. And the safest most purified form is Gamunex -c, starting at 2 gm/kg, and then given every 3-4 weeks at 1 gm/kg. I do not personally know a neurologist where you live, but the american academy of neurology does have a list of local members.