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Would this be coded as a revision with 36832, or can I code 37607 and 36901? "Under sterile and controlled conditions, the patient was prepped and draped in the usual sterile fashion. Micropuncture needle was then placed after lidocaine was infiltrated in the proximal part of the fistula. Fistulogram was obtained. It was noticed the patient had a patent arterial inflow and venous outflow with a large branch in the arm. The branch was localized. Small incision made over the branch. The branch was ligated with silk suture. Completion of fistulogram now showed a widely patent AV fistula with no flow in the accessory branch. The sheath was removed. Pressure was applied. Wounds were closed in a double layered fashion with skin reapproximated in a subcuticular fashion. Dermabond was applied, and patient left the operating room to be monitored in PACU."