Mark Edward Swierczewski, DDS
NPI 1134392277ActiveIndividual· Dentist, General Practice· Lancaster, PA
Opted out of Medicare from January 2021 to January 2027. Dentist, General Practice (DDS) in Lancaster, Pennsylvania, licensed in PA, with an NPI issued in April 2008. Part D covered 67 prescriptions written in 2024, 100% of them generic.
Overview
| NPI | 1134392277 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DDS |
| Sole proprietor | No |
| NPI issued | Apr 9, 2008 |
| Last updated in NPPES | May 24, 2021 |
| Certified by provider | May 24, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist, General Practice Primary | 1223G0001X | DS027660L | PA |
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 Jan 5, 2021 – Jan 5, 2027 |
| Can order and refer | No |
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) | 67 · 67 30-day fills |
|---|---|
| Patients | 55 |
| Total drug cost | $312.57 |
| Generic share | 100% of claims |
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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