Hi! I hope someone will be able to help me with this.... A patient developed complications several days after a maxillectomy w/ orbital exenteration and a Microvasular anastomosis forearm free flap procedures were performed. He was taken back into the op room for Neck exploration (CPT 35800) and a Microvasular thromectomy of forearm free flap venous vessels with reanastomosis of the venous vessels. What CPT code do I use to bill for the later procedure (Venous vessels reanastomosis)?

Any clue is appreciated.

Ldunder, CPC
ENT Indy