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I reported code 34805 for revision of a bifurcated endograft with creation of an aorto-uni-iliac graft, and Insurance denied as not performed. Can you advise me on what code this should be and let me know why code 34805 would not be correct? This is an abbreviated version of the note due to the space constraints. "Via the left transfemoral approach utilizing standard technique, 36 mm x 14 mm x 102 mm Endurant aorto-uni-iliac device was introduced. The superior mesenteric artery was utilized as a landing zone to elongate the proximal attachment site. Patient is in chronic renal failure and has no renal function. Both renal arteries will be covered. The graft was deployed without incident. The iliac limb was then created with a 16 mm x 16 mm x 124 mm Endurant iliac limb. This was completed with a 16 mm x 16 mm x 8 2 mm Endurant iliac limb. All attachment zones and overlap zones were dilated with a Compliant balloon catheter. There appeared to be a defect in the AUI device. At this point a 36 mm x 36 mm x 49 mm Endurant aortic cuff was positioned, and it was deployed across the expected location of the graft disruption."