Gregory V. Sierminski, D.D.S., P.C.
NPI 1720259013ActiveOrganization· Dentist· Crystal Lake, IL
Dentist in Crystal Lake, Illinois, registered in NPPES in March 2008. The authorized official on file is Gregory Valentine Sierminski, D.D.S, Dentist.
Overview
| NPI | 1720259013 |
|---|---|
| Status | Active |
| Entity type | Organization |
| NPI issued | Mar 14, 2008 |
| Last updated in NPPES | Mar 14, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dentist Primary | 122300000X | — | — |
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 |
|---|
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