Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Theresa H.T. Nguyen, ABOC

Specialist in Middletown, DE · enumerated 2009.

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

National Provider Identifier

1154655256

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Registry record

Entity type Individual (Type 1)

Name Ms. Theresa H.T. Nguyen

Credential ABOC

Sex Female

Practice address 4446 Summit Bridge Rd., Unit #7, Middletown, DE, 19709

Phone (302) 464-1069

Fax (888) 464-1099

Enumeration date Sep 23, 2009

Last updated in NPPES Sep 23, 2009

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 2009603551 (DE) Primary

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

How do I verify Theresa Nguyen's NPI record?

Cross-check NPI 1154655256 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1154655256 active?

Yes, as of the latest NPPES snapshot, NPI 1154655256 is active (record last updated 2009-09-23).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-09-23.