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Can you provide coding assistance for this case? "Procedure(s): 1) Ultrasound-guided access antegrade and retrograde left femoral AV graft. 2) Fistulogram with central venography. 3) Arteriography with iliofemoral runoff. 4) Angioplasty AV graft, arterial and venous anastomoses with 6x40 mm non-compliant balloon. Intraop Report: Using local anesthesia, ultrasound guidance, and a micropuncture system, the left femoral AV graft was accessed antegrade and retrograde. The transitional sheaths were immediately upsized to short 7 French sheaths. Contrast was injected to perform fistulogram with DSA runs visualizing the fistula in its entirety as well as the central veins in multiple views. This revealed venous outflow occlusion. Injection from catheter placed into the left iliac artery revealed focal stenosis at the arterial-graft anastomosis. These areas were angioplastied per above for 3-minute inflations."