• 1 - A condition where surgery has been performed (Surgical code)
• 2 - A condition where no surgery has been performed (non-surgical code)
  • 1 - Respiratory
    • 1 - Upper airway or trachea
      • 28 - Inflammation
        • 1 - Inhalation burns
        • 2 - Angioedema due to drug or treatment reaction
        • 3 - Oedema due to venous obstruction
        • 4 - Extubation related oedema or obstruction