If you will be billing that initial visit as a new patient visit then unfortunately you will only be able to code for what is done in that initial visit, which sounds like it would be a lower level code (i.e. 99202), you won't be able to bill for a new patient visit when the doctor does the more involved subsequent visit. Maybe you want to consider billing the initial visit as the visit with the provider and include the time spent, and components of the initial nurse visit?