Marshall S. Greenberg, D.M.D., P.C.

Orthodontic practice in Ansonia, CT

Registered providerLicense # listed (CT)

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Public-record details

Address: 201 Division St, Ansonia, CT 06401
Phone: (203) 735-9600
Listed under: Orthodontic practices
NPI: 1194997452
NPI status: Active in the NPPES registry
Provider type: Organization (practice, clinic or company)
Registered specialty (self-reported taxonomy): Orthodontics and Dentofacial Orthopedics (1223X0400X)
License number on NPI record: 3900 (CT)
Authorized official: Marshall Greenberg, DMD, Owner/president
NPI first issued: Mar 27, 2008
NPI record last updated: Mar 27, 2008

NPI 1194997452 is active in the federal NPPES registry (CMS) with Orthodontics and Dentofacial Orthopedics, an ADA-recognized dental specialty, as its self-reported primary taxonomy; license 3900 (CT) is listed on the record. Source: NPPES NPI Registry (CMS) (record). Data as of 2026-11-12.

What these registry facts mean

The NPI (National Provider Identifier) is the federal ID every HIPAA-covered provider uses to bill insurance. This NPI belongs to an organization, so it may cover several clinicians at this location. The specialty is the taxonomy the provider chose when registering; NPPES does not check it. A license number here is what the provider entered — confirm it with the state board before you rely on it. Orthodontists are dentists who completed an accredited orthodontic residency after dental school. General dentists can also offer braces or aligners, but they are not listed here.

View NPI 1194997452 in the official registry ↗

Checking credentials: the specialty shown is the one this provider registered with the NPI system. Your state dental board's license lookup confirms the license, and the American Board of Orthodontics lists board-certified orthodontists.

Public record, not an endorsement. This listing was compiled from public records as of 2026-11-12 and may be incomplete or out of date. Orthodontist Index does not vet, employ, recommend or guarantee orthodontic practices; a badge reflects only what the public record showed on that date. Confirm current details with the official record before you decide. The information on Orthodontist Index is not medical advice and does not replace a doctor, nurse, discharge planner or other qualified professional. Do not use it to make decisions about diagnosis or treatment. If you have a medical emergency, call 911. Full disclaimer · Report an error

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