The provider inserts a catheter through the skin (percutaneous approach) and guides it into the heart's arteries or a coronary artery bypass graft. They restore blood flow in a completely blocked vessel (chronic total occlusion) using both antegrade and retrograde approaches. This involves advancing wires and devices through the blockage in the forward (normal flow) direction and also crossing the lesion in reverse by threading a wire through collateral vessels into the far side of the blockage. The provider may use angioplasty, stent placement, and/or atherectomy. This code applies to a single major coronary artery, branch, or bypass graft, and/or the coronary artery and branches that graft supplies (the subtended artery).
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