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How would you code additional venography if MUEs for 75820/75822 is one? Do we code additionals with 75820/75822 with 59 modifiers, or use 76496? Venography below performed with heart cath. RT/LT arm venograms: Injections via peripheral IVs revealed patent axillary veins, with complete occlusion of RT/LT subclavians. SVC: complete occlusion of SVC. RIJ peripheral: Injection reveals complete occlusion at clavicle, with a network of collaterals. LT cephalic: Selective injection via left brachial sheath. Left cephalic vein enters collateral network that drains to left paravertebral plexus. There is complete occlusion of communication into subclavian vein. LT subclavian vein: With catheter in LT subclavian vein shows complete occlusion of LT subclavian vein as it passes between first rib and clavicle. Lt innom vein: Catheter advanced to LT innom vein, it is diminutive and completely occluded at SVC connection. RT innom vein: With catheter in RT innom vein it is found to be diminutive from caudal aspect of the RIJ into SVC.