I have been having issues lately with understanding when to use the appropiate ICD-9 codes in regards to pathology billing with the 88141, 88175 and the 87621 and so on...any helpful advice or websites would be GREATLY appreciated!!!

One scenario is a patient goes in for her annual exam and her history is listed as supervision of first normal pregnancy and there are no abnormal findings listed. What would be the proper codes to use? (both icd-9 and cpt)

I have many claims that pay as well as many that deny and I don't understand why?

Also in regards to Medicare, will they pay on a claim coded with V22.1 or V24.2?