Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

David D. Millen, D.M.D. PC

Q: What type of organization is David D. Millen, D.M.D. PC?

David D. Millen, D.M.D. PC is registered in NPPES as a Periodontics (its primary provider taxonomy).

Periodontics in Ansonia, CT · enumerated 2006 · authorized official David Millen, President.

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

National Provider Identifier

1629005574

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Registry record

Entity type Organization (Type 2)

Legal business name David D. Millen, D.M.D. PC

Practice address 560 Main Street, Ansonia, CT, 06401

Phone (203) 562-9700

Fax (203) 782-6285

Enumeration date Jun 27, 2006

Last updated in NPPES Jun 21, 2016

Taxonomy & classification

1223P0300X Periodontics Dental Providers · License 004183 (CT) Primary

Authorized official

Name David Millen

Title President

Phone (203) 732-0097

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.

Read the full guide → Validate an NPI →

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 David D. Millen, D.M.D. PC?

David D. Millen, D.M.D. PC is registered in NPPES as a Periodontics (its primary provider taxonomy).

Providers at this address

Browse all →

David Millen Periodontics · Ansonia, CT NPI 1083689640 Richard Rosenfeld Dentist · Ansonia, CT NPI 1386777068

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-21.