• 1 - A condition where surgery has been performed (Surgical code)
• 2 - A condition where no surgery has been performed (non-surgical code)
  • 2 - Cardiovascular
    • 4 - Heart valves
      • 9 - Degeneration
        • 1 - Chronic degeneration of aortic valve
        • 2 - Chronic degeneration of mitral valve
        • 3 - Chronic degeneration of pulmonary valve
        • 4 - Chronic degeneration of tricuspid valve