| 009N00Z | Drainage of Acoustic Nerve with Drainage Device, Open Approach |
| 009N0ZZ | Drainage of Acoustic Nerve, Open Approach |
| 009N30Z | Drainage of Acoustic Nerve with Drainage Device, Percutaneous Approach |
| 009N3ZX | Drainage of Acoustic Nerve, Percutaneous Approach, Diagnostic |
| 009N3ZZ | Drainage of Acoustic Nerve, Percutaneous Approach |
| 009N40Z | Drainage of Acoustic Nerve with Drainage Device, Percutaneous Endoscopic Approach |
| 009N4ZX | Drainage of Acoustic Nerve, Percutaneous Endoscopic Approach, Diagnostic |
| 009N4ZZ | Drainage of Acoustic Nerve, Percutaneous Endoscopic Approach |
