I recently watched a Medicare webinar that states ASC claims can not use a modifier 50 for a bilateral procedure. Does anyone know if this is followed by all insurance companies? I recently took over for a biller who sends claims for breast reductions 19318 with modifier 50 to BCBS and it pays, but I do not want to continue doing something incorrectly. I have also played around with the same procedure 19318 on 2 lines with a LT, RT modifier and 1 line gets denied. Any help will be appreciated. Thank you