Modifier G in a 78-year-old man with a history of three-vessel coronary bypass graft surgery who underwent coronary CT angiography to evaluate the patency of the grafts. Curved multiplanar reformatted CT angiographic images shows patent left internal mammary to the LAD. Extensive calcifications with severe luminal stenosis is seen in the LAD proximal to the site of graft insertion. The rest of the 2 grafts (not shown) were also patent with minimum disease in one of them. The patient was assigned CAD-RADS 1/G category. The stenotic segment bypassed by graft is not taken into consideration for CAD-RADS classification.CAD-RADS: Coronary Artery Disease Reporting and Data System, CT: computed tomography, LAD: left anterior descending.