42431 Per sextant
| 40000 | PERIODONTICS |
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| 42000 | PERIODONTAL SERVICES, SURGICAL |
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| 42400 | PERIODONTAL SURGERY, FLAP APPROACH |
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| 42430 | Flap Approach, With Curettage of Osseous Defect and Osteoplasty |
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| 42431 | Per sextant | $1011.61 | $1011.61 |