I'm assuming you are the biller and not a certified coder, right? So I have to ask, when you say "I've been told", who is telling you? The provider? If the provider is telling you to bill it a certain way then you must bill it that way. You shouldn't change anything in order to get payment. If you suspect that the coding is not correct it is ok to go back to the provider and explain why you feel it isn't correct and ask if they want to change it. I'm just trying to make sure you don't get into a gray area here. It is easy for a biller to get caught up in trying to get things paid because, after all, that is our job. But you don't want to do anything that can get you into trouble.
So with that being said:
I don't have any specific experience with this but you might want to look at suggesting the 51 modifier. When I research it that seems to be what is indicated. Also, have you searched the LCD's or NCD's? Even if it's not Medicare it may be helpful.