NPPES file of Aug 9, 2026

Thuan Nguyen, DO

Addiction Medicine (Internal Medicine) Physician · Ventura, CA

Thuan Nguyen, DO is an addiction medicine (internal medicine) physician with a practice address in Ventura, California, and NPI 1841841350, issued on Sep 25, 2019. Check the license (California 20A22046, 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
1841841350
Name
Thuan Nguyen
Credential
DO
Primary taxonomy
Addiction Medicine (Internal Medicine) Physician 207RA0401X
License number
20A22046 CA
Self-reported in NPPES; status is on the state search
Practice location
147 N Brent St, Ventura, CA 93003
Phone
(251) 424-1288
Enumerated
Sep 25, 2019
Record last updated
May 8, 2024
Medicare enrollment
Enrolled (PECOS I20250730003188); accepts Medicare assignment
Medical or professional school
Alabama College Of Osteopathic Medicine, 2021
Telehealth
Offers telehealth (CMS)
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 addiction medicine (internal medicine) physician records → All 73 in California → Look up another NPI →

Also registered at 147 N Brent St

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

  1. Jessica Adkins, M.D.Internal Medicine Physician1194968362
  2. Niaz AhankoobStudent in an Organized Health Care Education/Training Program1568103133
  3. Samira Ahrari, MDStudent in an Organized Health Care Education/Training Program1396680039
  4. Ralph Akl, DOFamily Medicine Physician1962071654
  5. Abdul Latif Al-Kassir, DOStudent in an Organized Health Care Education/Training Program1437909835
  6. Adnan Albrejawi Alhomsi, MDStudent in an Organized Health Care Education/Training Program1144023003

Verify Thuan 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 20A22046    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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77% fewer Medicare Part D claims than the average addiction medicine (internal medicine) physician in 2024

192 Medicare Part D claims for 63 beneficiaries, against an average of 829 among the 401 providers of this specialty who prescribed in Part D. 12 claims were for opioids.

  1. Thuan Nguyen192
  2. Specialty average829

Most prescribed

  1. Aripiprazole11 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: $485.80

7 payments; by number, the most common kind was food and beverage; the largest payer was Edwards Lifesciences Corporation. The 188 providers of this specialty with any payment received $1,761.64 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Thuan Nguyen$485.80
  2. Specialty average$1,761.64

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

Bills Medicare through one group practice

  1. Sharp Rees-Stealy Medical Group IncLa Mesa, CA

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

Thuan Nguyen among 73 addiction medicine (internal medicine) physician records in California

Thuan Nguyen, DO is one of 73 addiction medicine (internal medicine) physician records with a practice address in California. 75% 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 90% of them.

  • NPI issued2019 · 90% of these records are older, 5% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 45% of these records are
  • Graduated2021 · median 2008 among the 33 with a school on file
  • Record last updated2024 · 48% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0401X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Addiction Medicine (Internal Medicine) Physician providers in California

There are 73 addiction medicine (internal medicine) physician records in California.

All 73 in California → Every provider in Ventura → Addiction Medicine (Internal Medicine) Physician nationwide →

The 8 addiction medicine (internal medicine) physician records with the nearest ZIP codes

  1. Christopher KerriganVentura, CA 930031508253634
  2. John Horton, M.D.Santa Barbara, CA 931111265492508
  3. Mutahir Farhan, MDCorona, CA 928791033856661
  4. Blanca Trevino-Scatterday, MDOrange, CA 928681447321427
  5. Richard Scatterday, M.D.Anaheim, CA 928041134474042
  6. Ann Arcay, M.D.Santa Ana, CA 927011952415226
  7. Faried Banimahd, MDSanta Ana, CA 927011184860496
  8. Aury Holtzman, M.D.Huntington Beach, CA 926481548462567

Common questions

What is Thuan Nguyen, DO's NPI number?

Thuan Nguyen, DO's National Provider Identifier (NPI) is 1841841350, issued on Sep 25, 2019. An NPI identifies a provider in billing; it is not a license.

Where is Thuan Nguyen, DO located?

The NPPES record lists a practice address at 147 N Brent St, Ventura, CA, 93003. Phone: (251) 424-1288. Providers update this record themselves, so call before visiting.

How can I verify Thuan Nguyen, DO's license?

NPPES lists California license number 20A22046, 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 Thuan Nguyen, DO prescribe under Medicare Part D?

In 2024, Thuan Nguyen, DO had 192 Medicare Part D claims for 63 beneficiaries; the average among addiction medicine (internal medicine) physician prescribers was 829. 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.

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.