• 1 - A condition where surgery has been performed (Surgical code)
  • 1 - Respiratory
    • 1 - Upper airway or trachea
      • 27 - Infection
        • 1 - Mandible, facial bones, dental or salivary infection
        • 2 - Tonsil or pharyngeal infection
        • 3 - Epiglottitis
        • 6 - Pertussis
        • 7 - Respiratory sinus infection
        • 8 - Croup or laryngotracheobronchitis, non-influenza
        • 9 - Croup or laryngotracheobronchitis, influenza
        • 10 - Pandemic influenza, suspected
        • 11 - Pandemic influenza, confirmed
• 2 - A condition where no surgery has been performed (non-surgical code)