My office is now doing these temporary placements. The office manager is coding 64561, 64561-50 or 64561-LT and 64561-RT, when there are two placements to determine where to put the permanent one. The permanent is coded with 64581. Both Medicare and BCBS are denying the second one. I suggested using the 51 modifier. Does anyone have any input on this. This is a fairly new procedure in my office and I would like to get the billing right.