Hi. We have a situation that came up in our office that we are unsure on how to code. We have an orthopedic physican who comes to our facility 5 days per month. He is contracted through our clinic, and we do the coding and billing for anything he does while here. He is not a locum. He also practices in another town near here and does a lot of his surgeries there. The problem we are running into is, can we bill post-operative care when it is done in our facility, when the surgery was performed in another town, but by the same physician? Would we want to append the modifier -55 to this? Any suggestions would be appreciated!