In simple words: After opening a narrowed brain blood vessel with a balloon, the doctor opens another narrowed blood vessel in a different brain area using a balloon. This is done through the skin.

This add-on code describes a percutaneous balloon dilatation of an additional intracranial vessel in a different vascular territory following the initial vessel dilatation for intracranial vasospasm.

Example 1: A patient presents with intracranial vasospasm following a subarachnoid hemorrhage. The physician performs a percutaneous transluminal angioplasty and balloon dilatation of the right middle cerebral artery (MCA). During the procedure, vasospasm is also noted in the left anterior cerebral artery (ACA), a different vascular territory. The physician then performs an additional balloon dilatation of the left ACA., A patient is diagnosed with multiple intracranial vasospasms following a head injury. The physician performs balloon dilatations in two different vascular territories during the same procedure., After performing balloon angioplasty for a vasospasm in the posterior cerebral artery (PCA), the physician identifies another vasospasm in the anterior cerebral artery. An additional balloon dilatation is performed in the ACA.

Documentation should include details of the initial and subsequent balloon dilatations, including the vessels treated, the vascular territories involved, the techniques used, and any complications encountered. Angiographic evidence of vasospasm and the need for intervention should also be documented.

** Some insurance companies may consider this procedure investigational.