• 320 Bacterial meningitis
  • 321 Meningitis due to other organisms
  • 322 Meningitis of unspecified cause
  • 323 Encephalitis myelitis and encephalomyelitis
  • 324 Intracranial and intraspinal abscess
  • 325 Phlebitis and thrombophlebitis of intracranial venous sinuses
  • 326 Late effects of intracranial abscess or pyogenic infection
  • 327 Organic sleep disorders