Doctor ligated the distal brachial artery during a revision of a dialysis fistula with inflow reduction, repair of the proximal brachial artery, segmental and repair of the fistula and an aneurysmoplasty. He used codes 36832; 35206; 37607; 36901 and 36216. How do I code the ligation of the distal brachial artery? The only code I could find for ligation of an extremity artery is 37618, but that is only when due to rupture or injury.