| ICD Code | Description |
|---|---|
| 00N0 | Brain |
| 00N1 | Cerebral Meninges |
| 00N2 | Dura Mater |
| 00N6 | Cerebral Ventricle |
| 00N7 | Cerebral Hemisphere |
| 00N8 | Basal Ganglia |
| 00N9 | Thalamus |
| 00NA | Hypothalamus |
| 00NB | Pons |
| 00NC | Cerebellum |
| 00ND | Medulla Oblongata |
| 00NF | Olfactory Nerve |
| 00NG | Optic Nerve |
| 00NH | Oculomotor Nerve |
| 00NJ | Trochlear Nerve |
| 00NK | Trigeminal Nerve |
| 00NL | Abducens Nerve |
| 00NM | Facial Nerve |
| 00NN | Acoustic Nerve |
| 00NP | Glossopharyngeal Nerve |
| 00NQ | Vagus Nerve |
| 00NR | Accessory Nerve |
| 00NS | Hypoglossal Nerve |
| 00NT | Spinal Meninges |
| 00NW | Cervical Spinal Cord |
| 00NX | Thoracic Spinal Cord |
| 00NY | Lumbar Spinal Cord |