CPT® Code 35681

The CPT® Code 35681 refers to a surgical procedure known as a composite bypass graft, which involves the use of both prosthetic material and a segment of vein. This procedure is typically performed when a patient lacks an adequate segment of vein for a bypass graft, which is essential for restoring blood flow in cases of vascular obstruction. The physician constructs the graft by harvesting a segment of autogenous vein from the patient, which may include veins such as the ipsilateral greater saphenous vein, contralateral greater saphenous vein, cephalic or basilic arm vein, lesser saphenous vein, or superficial femoral vein. In some instances, a vein allograft, which is a vein harvested from an organ donor, may be utilized instead. The procedure involves the careful anastomosis of the harvested vein segment with a prosthetic vein segment to create a conduit of the necessary length for the bypass. This composite grafting technique is particularly important in patients who do not have sufficient vein availability in the limb undergoing the bypass, ensuring that the surgical intervention can be successfully completed to restore adequate blood circulation.