NPPES file of Aug 9, 2026

Duc Trong Nguyen, M.D.

Psychiatry Physician · Los Angeles, CA

Duc Trong Nguyen, M.D. is a psychiatry physician with a practice address in Los Angeles, California, and NPI 1639353766, issued on Dec 26, 2007. Check the license (California A101981, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1639353766
Name
Duc Trong Nguyen
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
A101981 CA
Self-reported in NPPES; status is on the state search
Practice location
1520 San Pablo St Ste 1652, Los Angeles, CA 90033
Phone
(323) 442-6000
Enumerated
Dec 26, 2007
Record last updated
Jan 29, 2019 (not updated in 7 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 1520 San Pablo St Ste 1652

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

  1. Huzaifa Ashraf, M.D.Psychiatry Physician1760895312
  2. Jaskanwar Batra, M.D.Psychiatry Physician1033183926
  3. Patrick Baumgart, MDPsychiatry Physician1366829624
  4. Cody Bryant, M.D.Psychiatry Physician1851832208
  5. Alan Chen, M.D.Psychiatry Physician1598111874
  6. Stephanie Cho, MDPsychiatry Physician1679916761

Verify Duc Trong Nguyen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A101981
    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 California 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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45% more Medicare Part D claims than the average psychiatry physician in 2024

1,448 Medicare Part D claims for 88 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.

  1. Duc Nguyen1,448
  2. Specialty average1,000

Most prescribed

  1. Quetiapine Fumarate141 claims
  2. Trazodone Hcl113 claims
  3. Bupropion Xl86 claims
  4. Duloxetine Hcl77 claims
  5. Mirtazapine59 claims
  6. Clonazepam54 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $820.49

36 payments; by number, the most common kind was food and beverage; the largest payer was Teva Pharmaceuticals USA, Inc. The 13,693 providers of this specialty with any payment received $4,954.93 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Duc Nguyen$820.49
  2. Specialty average$4,954.93

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Duc Trong Nguyen among 8,673 psychiatry physician records in California

Duc Trong Nguyen, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 33% of them.

  • NPI issued2007 · 33% of these records are older, 48% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileNo · 38% of these records are
  • Record last updated2019 · 54% 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 California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

987 psychiatry physician records list a practice address in Los Angeles

They are 987 of the 69,537 NPPES records with a practice address in Los Angeles, and 8,673 psychiatry physician records in California.

The 8 psychiatry physician records with the nearest ZIP codes

  1. Ikhlas Akra, M.D.Los Angeles, CA 900331992741979
  2. David Baron, DOLos Angeles, CA 900331417945486
  3. Jaskanwar Batra, M.D.Los Angeles, CA 900331033183926
  4. William Bondareff, MD,PHDLos Angeles, CA 900331225074156
  5. Timothy Botello, MDLos Angeles, CA 900331477581346
  6. Lawrence Gross, M.D.Los Angeles, CA 900331427032366
  7. Michael Hernandez, M.D.Los Angeles, CA 900331508865023
  8. Thomas Hicklin, MDLos Angeles, CA 900331548284383

Common questions

What is Duc Trong Nguyen, M.D.'s NPI number?

Duc Trong Nguyen, M.D.'s National Provider Identifier (NPI) is 1639353766, issued on Dec 26, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Duc Trong Nguyen, M.D. located?

The NPPES record lists a practice address at 1520 San Pablo St Ste 1652, Los Angeles, CA, 90033. Phone: (323) 442-6000. Providers update this record themselves, so call before visiting.

How can I verify Duc Trong Nguyen, M.D.'s license?

NPPES lists California license number A101981, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Duc Trong Nguyen, M.D. prescribe under Medicare Part D?

In 2024, Duc Trong Nguyen, M.D. had 1,448 Medicare Part D claims for 88 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.

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.

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.