Independent practice
Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC
General dentistry · Lindenhurst, NY
519 Google reviews
Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC
Key facts
- Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC is 1 of 35 general dentists listed in Lindenhurst, NY.
- Independent practice.
- Public rating 5 from 19 Google reviews.
SmilesAtlas verification
What we matched to public records, with links so you can verify it yourself.
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License not independently matched
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Independent practice
No parent organization or DSO brand in public records.
NPPES + ownership checkWhat we could not verify yet: What we have not confirmed: specialty board certification and CE currency. We would rather show a gap than a guess, so these stay empty until we can verify them.
Data freshness: NPI record 2026-08-23; Google listing 2026-06-07; practice website 2026-08-24. Confirm time-sensitive details directly.
About this practice
Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC is a general dental practice at 266 East Sunrise Highway in Lindenhurst, NY. Public records show it as independent practice (no parent organization or DSO brand in public records). It has 19 Google reviews at 5 stars. Posted hours cover 7 days a week.
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Hours
Friday: 9am to 2pmMonday: 9am to 2pmSaturday: 8am to 1pmSunday: ClosedThursday: 9am to 6pmTuesday: 9am to 6pmWednesday: Closed
Reputation
5
19 Google reviews
Frequently asked questions
Is Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC a verified dentist?
Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC is listed in the federal NPI registry, is independent practice, and has 19 Google reviews. The profile shows the source date and direct verification links.
Where do I confirm Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC's license?
Open the official NPI record at NPPES NPI Registry (CMS) and search the state dental board for the license number to confirm the status shown here.
Does Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC accept new patients?
We do not have a confirmed new-patient status for Marc N. Sperber, DDS & Joseph Portnoy, DDS, LLC; call the office to check.