• 1 - A condition where surgery has been performed (Surgical code)
  • 2 - Cardiovascular
    • 9 - Neck or extracranial vessels
      • 8 - Congenital or acquired deformity or abnormality
      • 15 - Haemorrhage
      • 28 - Inflammation
      • 30 - Obstruction
      • 39 - Tumour or malignancy
      • 56 - Trauma (or traumatic aneurysm, dissection, rupture or puncture)
      • 57 - Non-traumatic aneurysm, dissection or rupture
• 2 - A condition where no surgery has been performed (non-surgical code)