So sorry to hear of your daughter's trouble at such a young age. A second opinion is certainly in order. I have no specific recommendation, except to say look at teaching hospitals in larger cities. Often it is mostly covered by insurance if you have a referral, which doesn't have to come from the current neurologist--her primary care doc could make it.

It would be strange to diagnose someone with CIDP, then say IVIG wouldn't be a treatment for her. Often these neurologic issues take more than one doc, and trial & error for treatments, if her bloodwork was inconclusive. This is a great site for information.

Also, if an inflammatory condition is suspected, she should also be under the care of a rheumatologist. Again, a teaching hospital will have the most current and assertive approach. Ideally, both specialists are at the same facility and are communicating with each other.