I am trying to determine how to bill only the oncologist’s E/M done prior to the chemo administration that is performed in the hospital outpatient setting. The oncologist is the admitting physician; the pt goes home after the infusion. I’m not sure if I am supposed to bill a "normal" 99218-99220 for the initial E/M prior to the very first infusion, then bill 99224-99226 for subsequent visits. The physician is marking 99214 for each of the visits at the hospital but I am not convinced this is correct.

Any help would be greatly appreciated.