| Section | 0 | Medical and Surgical |
| Body System | 0 | Central Nervous System |
| Operation | 2 | Change: Taking out or off a device from a body part and putting back an identical or similar device in or on the same body part without cutting or puncturing the skin or a mucous membrane |
| Body Part 0 Brain E Cranial Nerve U Spinal Canal |
Approach X External |
Device 0 Drainage Device Y Other Device |
Qualifier Z No Qualifier |