1 NPI-registered providers practice in Nassau County Long Island, New York. Pick another city in the rail, or open the full search to filter by specialty and credential.
| Provider | Specialty | Location | NPI |
|---|---|---|---|
| Nicholas JohnnidisD.M.D. | General Practice Dentistry | Nassau County, Long Island, NY | 1215181284 |
Source: CMS NPPES Data Dissemination (June 2026).
