mtsoldevila
Networker
I work for an infectious disease office. I billed K82.A2, D72.829,R50.9 on this same order and it was denied for invalid principal dx. I then billed K82.1 as primary and then K82.A2, D72.829,R50.9 ,and received the same denial. I looked at the coding guidelines for k81.1 and k82a.2 and cant find anything that tells me how to bill. Anyone knows why these codes are denied as primary dx codes?