Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John T. Tieu D.M.D, P.C.

Q: What type of organization is John T. Tieu D.M.D, P.C.?

John T. Tieu D.M.D, P.C. is registered in NPPES as a General Practice Dentistry (its primary provider taxonomy).

General Practice Dentistry in Dorchester, MA · enumerated 2007 · authorized official John Tieu, Dentist.

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

National Provider Identifier

1588865349

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Registry record

Entity type Organization (Type 2)

Legal business name John T. Tieu D.M.D, P.C.

Other name <Unavail>

Practice address 101 Allstate Rd, Suite 107, Dorchester, MA, 02125

Phone (617) 442-2535

Enumeration date May 30, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers · License 20059 (MA) Primary

Authorized official

Name John Tieu

Title Dentist

Phone (617) 442-2535

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 type of organization is John T. Tieu D.M.D, P.C.?

John T. Tieu D.M.D, P.C. is registered in NPPES as a General Practice Dentistry (its primary provider taxonomy).

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.

Providers at this address

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John Tieu General Practice Dentistry · Dorchester, MA NPI 1467422055

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.