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Looking for codes for a stent and angioplasty to the central shunt as follows: "Using a 5 French long flexor sheath into the right femoral artery, stent was inserted in the right-sided shunt. The stent was deployed in the junction of the right BT shunt and the right pericardial tube. The stented region was ballooned again. Post stenting, angiography demonstrated patency of the shunts and the LLPA. Left lower branch of the LPA was ballooned as well. Shuntogram of the left BT shunt and right-sided shunt were performed prior to the revascularization." Struggling to find codes applicable to the shunt work.