• 320-327 Inflammatory diseases of the central nervous system
  • 330-337 Hereditary and degenerative diseases of the central nervous system
  • 338-338 Pain
  • 339-339 Other headache syndromes
  • 340-349 Other disorders of the central nervous system
  • 350-359 Disorders of the peripheral nervous system
  • 360-379 Disorders of the eye and adnexa
  • 380-389 Diseases of the ear and mastoid process