Repeated Procedure

“My billing team and I have a difference of opinion. If we apply more than one graft, they have been using modifier -76. It is getting paid, but I am not sure that is the appropriate use of the modifier. I just assumed that we would bill for total units. However, each graft has a unit number. So, if we bill double the units, we need a way to alert the insurance company why the units are doubled. This is why we started using the 76 modifier. Any input would be appreciated.”