• 1 - A condition where surgery has been performed (Surgical code)
• 2 - A condition where no surgery has been performed (non-surgical code)
  • 2 - Cardiovascular
    • 1 - Coronary arteries
      • 8 - Congenital or acquired deformity or abnormality
        • 1 - Coronary sinus fistula
        • 2 - Anomalous coronary artery