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Is there anything additional to code/bill when a Pruitt-Inahara shunt is necessary to maintain adequate blood pressure?

"Distal internal carotid artery was skeletonized and secured by vessel loops, and vascular clamps were applied. The EEG was initially unchanged; however, the technician notified me that it was now depressed. I attempted to raise the blood pressure; however, it remained depressed. A Pruitt-Inahara shunt was placed in the usual manner with return of the EEG to baseline and remained at baseline for the remainder of the procedure. Arteriotomy and standard endarterectomy were then successfully completed."