| ICD Code | Description |
|---|---|
| 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 |