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N121
N121 – Extracranial-intracranial long venous bypass
OHIP Neurological Surgical Procedures Code — NEUROLOGICAL SURGICAL PROCEDURES · Schedule of Benefits
Extracranial-intracranial long venous bypass is a complex neurosurgical procedure. It involves creating a graft, typically using a vein, to bypass an occluded or stenotic artery. The bypass connects an extracranial artery (such as the internal carotid artery in the neck or other trunk vessels in the neck or chest) to an intracranial artery (e.g., the vertebral, internal carotid, or middle cerebral artery) to restore or augment blood flow to the brain.
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