Hi Helen,
In Canada, (where the gov't pays for tests...) they were happy to do a virul load test when they thought I was going to do interferon, then 8 months later, my family Dr. and I wanted to see if my alternatives were making a difference we ordered another one. Well my Dr. got in royal s**t from the billing people and it took months to get the results. She was warned not to order another one...
It seems that it is used to measure the results of the interferon treatments.
On a positive note my test showed that my virul load went down. From 3.5 million down to 2.6 million, for what it's worth.....

I'm not sure what it's going to cost you in the states, it'll be interesting to see how it goes for you.
alley