Here in Canada they do an initial HCG count when you do your prenatal blood draw. There are several other things they check for at the same time, and the HCG is to confirm pregnancy. (No more poas at the Dr, which threw me this time!)
I've never call ed to check mine though, and they don't usually call unless there's a problem. I've never had a re-draw to check if numbers are doubling, but thankfully I've only had one MC so that usually isnt' a worry for me.