John Frederick Hamrick, DMD
NPI 1639210305ActiveIndividual· Dentist, Periodontics· Greenville, SC
Opted out of Medicare from April 2013 to April 2027. Dentist, Periodontics (DMD) in Greenville, South Carolina, licensed in SC, with an NPI issued in February 2007. Part D covered 1,217 prescriptions written in 2024, 99% of them generic. Biohorizons Implant Systems Inc. was the largest of 2 companies reporting payments in 2025, $44.44 in all, mostly food and beverage.
Overview
| NPI | 1639210305 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DMD |
| Sole proprietor | No |
| NPI issued | Feb 8, 2007 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist, Periodontics Primary | 1223P0300X | 2496 | SC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 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 Apr 14, 2013 – Apr 14, 2027 |
| 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.
Part D prescriptions in 2024
| Prescriptions (claims) | 1,217 · 1,228 30-day fills |
|---|---|
| Patients | 320 |
| Total drug cost | $4,324 |
| Generic share | 99% of claims |
Industry payments (Open Payments)
- 2025$44.44 · 2 payments from 2 companies
- 2024$207.89 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biohorizons Implant Systems Inc. | $24.70 | 1 |
| Geistlich Pharma, North America, Inc. | $19.74 | 1 |
What the 2025 payments were for
- Food and Beverage$44.44 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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