http://link.springer.com/journal/10875
Hello Susan, this is really tough! The problem that medicare has is typical of the red tape mentality. There are no published studies of the pharmacokinetics of 10% Octagam given 2 weekly. HOWEVER. The FDA have approved use given 3 weekly. This may be an option. Work out your dose over twelve weeks, and give a quarter every three weeks.
The next option is to check all these with other manufacturers of IgG. Ideally, the study to obtain this data would not be large and expensive, and may well be in house, awaiting publication.
John