• 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
      • 8 - Congenital or acquired deformity or abnormality
        • 1 - Mouth, mandible, pharynx or facial bones deformity
        • 3 - Laryngomalacia
        • 4 - Tracheomalacia
        • 5 - Choanal atresia
        • 6 - Abnormality of vocal cord
        • 7 - Traumatic tracheo-oesophageal fistula
        • 8 - Non-traumatic tracheo-oesophageal fistula