Can someone help? We are billing Medicare the 93015 in an area that recently became HPSA and the code is now being denied as an "unprocessable" code. Only the professional component of this service qualifies for the bonus payment. Medicare wants us to rebill the claims. This leads me to believe we have to bill 93016 and 93018 (PC). Can anyone confirm this? Should we bill all three codes? 93016,93017,93018.