CPT® Code 61635

Transcatheter placement of intravascular stent(s), intracranial (eg, atherosclerotic stenosis), including balloon angioplasty, if performed

The CPT® Code 61635 refers to the transcatheter placement of intravascular stent(s) within the intracranial arteries, specifically for conditions such as atherosclerotic stenosis. This procedure may include the performance of balloon angioplasty if deemed necessary. Atherosclerotic stenosis is a condition characterized by the narrowing of arteries due to the buildup of plaque, which can impede blood flow and lead to serious complications such as stroke. The procedure begins with the preparation of the patient, which involves cleansing the skin over the catheter access site and administering a local anesthetic to minimize discomfort. A small incision is made to access the blood vessel, allowing for the insertion of a needle followed by a sheath to facilitate catheter placement. Once access is achieved, a microcatheter or neurointerventional guidewire is carefully threaded through the access artery to reach the carotid circulation. The specific intracranial artery requiring treatment is then selectively catheterized using an arteriography catheter, enabling the physician to perform diagnostic arteriography. This imaging step is crucial for assessing the anatomy of the artery and determining the necessity for balloon angioplasty. If indicated, the procedure may involve the inflation of a balloon to dilate the stenotic area, followed by the placement of an intravascular stent to maintain the artery's patency. Throughout the procedure, fluoroscopic guidance is utilized to ensure accurate placement and to monitor for any potential complications. The careful execution of these steps is essential for the successful treatment of intracranial arterial stenosis, ultimately aiming to restore normal blood flow and reduce the risk of adverse events.