I remember reading somewhere (not sure where) that 29877 is not to be bill with an osteoarthritis code (715.16). I sought help from within our department, but was only told that 717.7 is how we get paid. I know what codes to use to get the procedure paid, but when all the doctor is using for a diagnosis code is concerning arthritis (in the body of the report it does state there was loose cartilage and different grades of changes, i.e. grade II and III), is it still billable?