NPPES file of Aug 9, 2026

Diana Khoa Nguyen, DO

Psychiatry Physician · Dallas, TX

Diana Khoa Nguyen, DO is a psychiatry physician with a practice address in Dallas, Texas, and NPI 1699304568, issued on Apr 3, 2020. Check the license (Texas T8002, 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
1699304568
Name
Diana Khoa Nguyen
Credential
DO
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
T8002 TX
Self-reported in NPPES; status is on the state search
Practice location
4701 Samuell Blvd, Dallas, TX 75228
Phone
(972) 861-5611
Enumerated
Apr 3, 2020
Record last updated
Dec 8, 2025
Medicare enrollment
Enrolled (PECOS I20250625003758); accepts Medicare assignment
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.
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8 nearest psychiatry physician records → All 3,318 in Texas → Look up another NPI →

Also registered at 4701 Samuell Blvd

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

  1. Lori Falknor, MA, LPC INTERNMental Health Counselor1457378465
  2. Kipp Harmon, LPC INTERNCounselor1861616682
  3. Meredith McEneny, M. ED, LPC INTERNMental Health Counselor1891817003
  4. Adrian MejiaChild & Adolescent Psychiatry Physician1487187530
  5. Wanda Miller, LCDCAddiction (Substance Use Disorder) Counselor1265388813
  6. Clarissa Morales, LPCProfessional Counselor1457579278

Verify Diana Khoa Nguyen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license T8002    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.

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Bills Medicare through one group practice

  1. Dallas County Mental Health And Mental Retardation CenterDallas, TX

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

Diana Khoa Nguyen among 3,318 psychiatry physician records in Texas

Diana Khoa Nguyen, DO is one of 3,318 psychiatry physician records with a practice address in Texas. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 85% of them.

  • NPI issued2020 · 85% of these records are older, 11% newer
  • In a Medicare fileYes · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 45% of these records are
  • Graduated2020 · median 2006 among the 1,481 with a school on file
  • Record last updated2025 · 49% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

419 psychiatry physician records list a practice address in Dallas

They are 419 of the 36,304 NPPES records with a practice address in Dallas, and 3,318 psychiatry physician records in Texas.

All 3,318 in Texas → Every provider in Dallas → Psychiatry Physician nationwide →

The 8 psychiatry physician records with the nearest ZIP codes

  1. Shazia Basit, MDDallas, TX 752281649462219
  2. John Bennett, M.D.Dallas, TX 752281306857446
  3. Kristen Grable, M.D.Dallas, TX 752281720001118
  4. Mary Knesevich, M.D.Dallas, TX 752281033120811
  5. Carmen Llauger-Mier, M.D.Dallas, TX 752281639180342
  6. John Pascoe, MDDallas, TX 752281467460774
  7. Kathryn Sickorez, M.D.Dallas, TX 752281861652984
  8. Mark Unterberg, M.D.Dallas, TX 752281316958655

Common questions

What is Diana Khoa Nguyen, DO's NPI number?

Diana Khoa Nguyen, DO's National Provider Identifier (NPI) is 1699304568, issued on Apr 3, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Diana Khoa Nguyen, DO located?

The NPPES record lists a practice address at 4701 Samuell Blvd, Dallas, TX, 75228. Phone: (972) 861-5611. Providers update this record themselves, so call before visiting.

How can I verify Diana Khoa Nguyen, DO's license?

NPPES lists Texas license number T8002, 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.