• 1 - A condition where surgery has been performed (Surgical code)
  • 3 - Gastrointestinal
    • 4 - Duodenum
      • 30 - Obstruction
        • 1 - Duodenal or ampullary tumour
        • 2 - Duodenal atresia
        • 3 - Meconium ileus
• 2 - A condition where no surgery has been performed (non-surgical code)