I work for a family practice where most female CPX's are done by the pt's male PCP however, the PAP and/or Breast exams are done by our female Physician's Assisstant. During exam by our PA, the patient often offers up more problems/concerns. Our PA then advises the pt on said problems/concerns. We would like to bill for both the level and the PAP being obtained. When entering the charge for this with a 25 modifier, I encounter many errors. Is there a different modifier that would apply (either 51 or 59?)? Any other advice? Thanks!