What determines the place of service? I know for the vast majority of situations it is where the service occurs. However for 59400, it is an general obstetrical code that includes all prenatals, vaginal birth, and postpartums, if all of the prenatals occur in an office and the birth occurs at home which place of service would you use? I believe that you would use the place of the birth, however I have a provider that is trying to get me to bill under office (her reasoning being that is where the majority of the code occurred) because the insurance plan does not reimburse for place of service being home.