One of our physicians has a patient that has had a partial knee replacement ( medial). He is having problems with it and so the physician is going to do a revision to another partial knee/ unicompartmental (medial ). I have no clue what to code. Would I code it as a 27487-52 ? Patient is not in a global. The first surgery was 3 years ago. I have coded a partial to a total knee replacement before, but this is the first time I have a partial to another partial . . . . Surgery has not occurred yet, but we need to get authorization, so I need to have a code(s) to do that. I questioned whether or not he was going to a total knee replacement, and he said that is not the plan at this time. He is planning to take out the existing partial and implant another partial .
Any help or advice is very much appreciated. Please help