• 1 - A condition where surgery has been performed (Surgical code)
  • 4 - Neurological (including eyes)
    • 1 - Head, neck (extracranial) or eyes
    • 2 - Brain, CSF, meninges or skull vault
    • 3 - Spinal cord
    • 4 - Peripheral nervous system
    • 5 - Neuro-muscular junction
• 2 - A condition where no surgery has been performed (non-surgical code)