Ask Dr. Z

I am having trouble deciding when it's appropriate to use code 35883 alone or with other codes. What all does this code include? One case - previous iliofemoral bypass, which was aneurysmal. "After dissection and mobilization it avulsed off the proximal anastomosis. The entire graft was removed from operative field, and a new 8 mm graft was placed in the same location, distal external iliac to distal common femoral." Is this reported with code 35883 alone or just removal of graft (37799) and 35665? The other case was similar, ax-fem-fem bypass with aneursym on left femoral artery. "Patent ax-fem on the right, occluded fem/fem. Thrombectomy of right to left fem/fem. Aneursym of left femoral artery resected and interposition graft was placed left femoral artery to left profunda artery after it was thrombectomized." Is this codes 35883 and 35875-59 (for fem/fem thrombectomy)??? Also considered 35876. Can you please advise on these cases and how to determine when to use 35883 alone or with other codes.