NOTE: Exclude from coding the use of cardiopulmonary bypass equipment on this case

NOTE: Exclude from coding the use of cardiopulmonary bypass equipment on this case. PREOPERATIVE DIAGNOSIS: Critical aortic valvular stenosis POSTOPERATIVE DIAGNOSIS: Critical aortic valvular stenosis OPERATION: Aortic valve replacement with a 21-mm Medtronic Open Pivot valve PROCEDURE DETAILS: Under general anesthesia, with the chest, abdomen, groin, and lower extremities prepped and draped in a sterile fashion, a median sternotomy incision was made. The sternum was split along the midline using a sternal saw. The Cooley retractor was inserted, and the pericardium was opened. Pericardial stay sutures were placed. The aorta and the right atrium were cannulated in the usual manner. The patient was placed on cardiopulmonary bypass and was cooled to 28 degrees Centigrade. Once on bypass, the aortic crossclamp was applied, and the initial dose of cold oxygenated crystalloid cardioplegia was given via the aortic root, and cold topical saline slush solution was applied, and the initial dose of cold topical saline slush solution was applied to the pericardial well. When the heart was cold and quiet, the right superior pulmonary vein was exposed and opened, and a right angle vent catheter was inserted into this opening. The aorta was opened just above the coronary ostium aortic annulus, and the aortic valve was exposed through this transverse aortotomy. The valve leaflets were What is the ICD PCS code for this report?