• 1 - A condition where surgery has been performed (Surgical code)
  • 2 - Cardiovascular
    • 9 - Neck or extracranial vessels
      • 57 - Non-traumatic aneurysm, dissection or rupture
        • 1 - Non-traumatic rupture of carotid or vertebral artery
        • 2 - Non-traumatic carotid or vertebral artery aneurysm or dissection
• 2 - A condition where no surgery has been performed (non-surgical code)