• 1 - A condition where surgery has been performed (Surgical code)
• 2 - A condition where no surgery has been performed (non-surgical code)
  • 4 - Neurological (including eyes)
    • 3 - Spinal cord
      • 12 - Epidural or spinal drug administration
        • 1 - Epidural injection or infusion
        • 2 - Spinal injection or infusion