anti-myelin antibody tests?

Thanks for the note:
No one has suggested Plasma Exchange. I am going to ask the docs to increase the IVIG. I’ve only received 10 grams once (this week) and I’m not scheduled again for 2 weeks.

Are there are specific lab tests that can identify what antibody is attacking the myelin? If so, are they primarily done in a referral center or do community-based neurologists have the ability/knowledge to order them? It seems to me that CIDP is a diagnosis of exclusion….

Thanks, and God bless
Melissa