What is the modifier for reoperation by neck incision for 60 days after initial procedure of thromboendarterectomy of carotid artery with a patch graft?

The appropriate modifier for reoperation by neck incision within 60 days after an initial thromboendarterectomy of the carotid artery with a patch graft is modifier -78. This modifier indicates a return to the operating room for a related procedure during the global period of the initial surgery, signaling that the reoperation is due to complications or issues arising from the initial procedure.