Hi
We are also moving to the States and wanted to get cover for at least the first year, if you call American Express they can off a one year policy it is called a Gap Year Policy - I think and it will cover you for emergencies dental etc there is an excess, but for us a family of 3 my daughter is 17 it is approx £675. My brother took something like this out for his first year and they have used it a few times, it is a good policy to start with....