• 1 - A condition where surgery has been performed (Surgical code)
  • 4 - Neurological (including eyes)
    • 1 - Head, neck (extracranial) or eyes
      • 27 - Infection
        • 1 - Mandible, facial bones, dental or salivary infection
        • 2 - Tonsil or pharyngeal infection
        • 3 - Orbital cellulitis
        • 4 - Respiratory sinus infection
        • 5 - Mastoid infection
• 2 - A condition where no surgery has been performed (non-surgical code)