• 1 - A condition where surgery has been performed (Surgical code)
  • 4 - Neurological (including eyes)
    • 1 - Head, neck (extracranial) or eyes
      • 8 - Congenital or acquired deformity or abnormality
      • 15 - Haemorrhage
      • 27 - Infection
      • 39 - Tumour or malignancy
      • 41 - Vascular
      • 56 - Trauma
      • 57 - Non-traumatic aneurysm or dissection
• 2 - A condition where no surgery has been performed (non-surgical code)