I have had several rounds of IVIG - two while in the hospital and three at home. These were done while I was on my private BCBS insurance. The insurance company paid the total cost for each (which I believe the cost for each is about $25,000). Since I had no positive results from IVIG I didn't pursue it. I'm not sure about Medicare coverage. I would think that if Medicare approves the procedure under Part B your supplemental insurance will cover their portion of the remaining cost. The facility that would be doing the procedure may be able to help you with your concerns.
Southern Bell