Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC
About this NPIWhat this record shows.
NPI 1861567166 is registered to Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC, a healthcare organisation classified as "General Practice Dentistry" and located at 266 East Sunrise Highway in Lindenhurst, New York. The organisation's authorised official is Marc Sperber. The organisation has been enumerated in the NPI registry since 2006.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC accepts. To confirm in-network status with your specific health plan, contact Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC directly at (631) 226-5252.
Frequently asked
Yes. NPI 1861567166 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
General Practice Dentistry is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (631) 226-5252.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC is a Type-2 organisational NPI.