Looking For A Medical CPT Code For DYNAMIZATION OF IM NAIL LT FEMUR. Can Anyone Help? THANKS, LINDA?

SURGICAL PROCEDURE BEING DONE ON ONE OF MY PATIENTS:NON UNION OF FEMUR/ALREADY HAS IM ROD IN PLACE/PHYS. GOING TO DO A DYNAMIZATION PROCEDURE BUT I CAN'T FIND THE CORRECT CODE. ANY HELP WOULD BE APPRECIATED.