• 1 - A condition where surgery has been performed (Surgical code)
  • 2 - Cardiovascular
    • 9 - Neck or extracranial vessels
      • 8 - Congenital or acquired deformity or abnormality
        • 1 - Extracranial or neck arterio-venous malformation or haemangioma
• 2 - A condition where no surgery has been performed (non-surgical code)