ICD-10-PCS code 0N9R0ZZ for Drainage of Maxilla, Open Approach is a medical classification as listed by CMS under Head and Facial Bones range.
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| Change Type | Change Date | Previous Descriptor |
| Code Revised | 10-01-2017 | Drainage of Right Maxilla, Open Approach |
| Code Added | 10-01-2015 |