NPPES file of Aug 9, 2026

Nghia Duy Nguyen, DO

Gastroenterology Physician · Harlingen, TX

Nghia Duy Nguyen, DO is a gastroenterology physician with a practice address in Harlingen, Texas, and NPI 1538725890, issued on May 13, 2019. Check the license (Texas V6658, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1538725890
Name
Nghia Duy Nguyen
Credential
DO
Primary taxonomy
Gastroenterology Physician 207RG0100X
License number
V6658 TX
Self-reported in NPPES; status is on the state search
Practice location
512 Victoria LN Ste 2, Harlingen, TX 78550
Phone
(956) 365-4400
Enumerated
May 13, 2019
Record last updated
Dec 4, 2025
Fax
(956) 365-4111
Medicare enrollment
Enrolled (PECOS I20250506002285); accepts Medicare assignment
Medical or professional school
University Of North Texas Hsc, College Of Osteopathic Med, 2019
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest gastroenterology physician records → All 1,478 in Texas → Look up another NPI →

Also registered at 512 Victoria LN Ste 2

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ana Aguayo, PAMedical Physician Assistant1952980690
  2. Oscar Alvarez, MDGastroenterology Physician1376565838
  3. Lisa Briones, PAMedical Physician Assistant1477296960
  4. Alyssa Dawson, CRNACertified Registered Nurse Anesthetist1154803039
  5. Miriam De Leon, PA-CMedical Physician Assistant1396206983
  6. Tania Garcia, NPFamily Nurse Practitioner1265547251

Verify Nghia Duy Nguyen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license V6658    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Gastroenterology Consultants OF South Texas, PLLCMcAllen, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Nghia Duy Nguyen among 1,478 gastroenterology physician records in Texas

Nghia Duy Nguyen, DO is one of 1,478 gastroenterology physician records with a practice address in Texas. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 94% of them.

  • NPI issued2019 · 94% of these records are older, 3% newer
  • In a Medicare fileYes · 89% of these records are
  • In the CMS Doctors and Clinicians fileYes · 79% of these records are
  • Graduated2019 · median 2003 among the 1,175 with a school on file
  • Record last updated2025 · 53% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gastroenterology Physician providers in Texas

There are 1,478 gastroenterology physician records in Texas.

All 1,478 in Texas → Every provider in Harlingen → Gastroenterology Physician nationwide →

The 8 gastroenterology physician records with the nearest ZIP codes

  1. Oscar Alvarez, MDHarlingen, TX 785501376565838
  2. Wayne Green, M.D.Harlingen, TX 785501114906278
  3. Nicole Grigg Gutierrez, MDHarlingen, TX 785501750516035
  4. Oral James, M.D.Harlingen, TX 785501235178799
  5. Owen Maat, MDHarlingen, TX 785501295780609
  6. Nolan Perez, MDHarlingen, TX 785501184726986
  7. Jason Phillips, M.D.Harlingen, TX 785501760442685
  8. Sandeep Samuel, MDHarlingen, TX 785501174822647

Common questions

What is Nghia Duy Nguyen, DO's NPI number?

Nghia Duy Nguyen, DO's National Provider Identifier (NPI) is 1538725890, issued on May 13, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Nghia Duy Nguyen, DO located?

The NPPES record lists a practice address at 512 Victoria LN Ste 2, Harlingen, TX, 78550. Phone: (956) 365-4400. Providers update this record themselves, so call before visiting.

How can I verify Nghia Duy Nguyen, DO's license?

NPPES lists Texas license number V6658, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.