| Section | 0 | Medical and Surgical |
| Body System | 0 | Central Nervous System |
| Operation | H | Insertion: Putting in a nonbiological appliance that monitors, assists, performs, or prevents a physiological function but does not physically take the place of a body part |
| Body Part 0 Brain 6 Cerebral Ventricle E Cranial Nerve U Spinal Canal V Spinal Cord |
Approach 0 Open 3 Percutaneous 4 Percutaneous Endoscopic |
Device 2 Monitoring Device 3 Infusion Device M Neurostimulator Lead |
Qualifier Z No Qualifier |