• 1 - A condition where surgery has been performed (Surgical code)
  • 1 - Respiratory
    • 5 - Pleura or mediastinum
      • 8 - Congenital or acquired deformity or abnormality
      • 15 - Haemorrhage
      • 27 - Infection
      • 39 - Tumour or malignancy
      • 56 - Trauma (or traumatic fistula)
      • 57 - Non-traumatic fistula
• 2 - A condition where no surgery has been performed (non-surgical code)