| 0N9100Z | Drainage of Frontal Bone with Drainage Device, Open Approach |
| 0N910ZX | Drainage of Frontal Bone, Open Approach, Diagnostic |
| 0N910ZZ | Drainage of Frontal Bone, Open Approach |
| 0N9130Z | Drainage of Frontal Bone with Drainage Device, Percutaneous Approach |
| 0N913ZX | Drainage of Frontal Bone, Percutaneous Approach, Diagnostic |
| 0N913ZZ | Drainage of Frontal Bone, Percutaneous Approach |
| 0N914ZX | Drainage of Frontal Bone, Percutaneous Endoscopic Approach, Diagnostic |
| 0N914ZZ | Drainage of Frontal Bone, Percutaneous Endoscopic Approach |
