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Marc A. Greer Dmd

General Practice Dentistry in Portsmouth, NH · enumerated 2007 · authorized official Marc Greer, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1205011046

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Registry record

Entity type Organization (Type 2)
Legal business name Marc A. Greer Dmd
Practice address 85 Merrimac St, Portsmouth, NH, 03801
Phone (603) 436-6922
Enumeration date Dec 28, 2007
Last updated in NPPES Dec 28, 2007

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers · License 2328 (NH) Primary

Authorized official

Name Marc Greer
Title Owner
Phone (603) 436-6922

Other identifiers

Identifier Type State Issuer
1223G0001X Other NH DENTAL

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Marc A. Greer Dmd?
Marc A. Greer Dmd is registered in NPPES as a General Practice Dentistry (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-28.