The cost of the ivig is based on the size of the person and the dosage the doc orders. I was on .4 grams of ivig per kilogram of weight weekly and the cost was about $10,000/treatment. My ins negotiated a deal and actually paid $3,400 of the total cost per treatment. However, my doc changed my dosage to 1.0 grams per kilogram of weight biweekly about 2 months ago and I haven't seen the bill or payments for that yet. Obviously, it will be higher because the cost is almost all in the cost of the medication. Just think, it takes about 1,000 blood donations to manufacture 1 dose! Expensive!