• 1 - A condition where surgery has been performed (Surgical code)
  • 4 - Neurological (including eyes)
    • 2 - Brain, CSF, meninges or skull vault
      • 7 - Coma or encephalopathy
      • 8 - Congenital or acquired deformity or abnormality
      • 15 - Haemorrhage
      • 27 - Infection
      • 33 - Seizures
      • 39 - Tumour or malignancy
      • 41 - Vascular
      • 56 - Trauma
      • 57 - Non-traumatic aneurysm
• 2 - A condition where no surgery has been performed (non-surgical code)