Gregg Walker McKenzie, DDS
NPI 1427029511ActiveIndividual· Dentist, Periodontics· Columbia, SC
Opted out of Medicare from August 2012 to August 2028. Dentist, Periodontics (DDS) in Columbia, South Carolina, licensed in SC, GA and LA, with an NPI issued in January 2006.
Overview
| NPI | 1427029511 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DDS |
| Sole proprietor | Yes |
| NPI issued | Jan 28, 2006 |
| Last updated in NPPES | Sep 5, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist, Periodontics Primary | 1223P0300X | SC2339 | SC |
| Dentist, Periodontics | 1223P0300X | DN008953 | GA |
| Dentist, Periodontics | 1223P0300X | 3175 | LA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Aug 23, 2012 – Aug 23, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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