initial ob visit / robotic hysterectomy

A couple of questions. I understand that I cannot bill for an initial prenatal visit as it is part of the global ob package but that I can bill for a pap smear and g/c cultures. Normally, if a patient has not had a pap within the last 6 months, we do one at her initial visit but most insurance don't cover a pap that has not been at least a year out unless the diagnosis is abnormal. Do I have to add v22.1 as well as v72.31 to get it covered? I seem to have a problem getting paid for the cultures as well. Is there a secret to that?

Also, I was informed that I can bill the code S2900 with 58544 for Robotic Lap Hysterectomy. Is this correct because this code is denying for me as well? Do I need a modifier on it?? Thank for the help!!