• 1 - A condition where surgery has been performed (Surgical code)
• 2 - A condition where no surgery has been performed (non-surgical code)
  • 3 - Gastrointestinal
    • 4 - Duodenum
      • 8 - Congenital or acquired deformity or abnormality
      • 15 - Haemorrhage
      • 30 - Obstruction
      • 39 - Tumour or malignancy
      • 56 - Trauma (or traumatic rupture or fistula)
      • 57 - Non-traumatic perforation, rupture or fistula