NPPES file of Aug 9, 2026

Brian Minh Quan Nguyen, DO

Glaucoma Specialist (Ophthalmology) Physician · Thousand Oaks, CA

Brian Minh Quan Nguyen, DO is a glaucoma specialist (ophthalmology) physician with a practice address in Thousand Oaks, California, and NPI 1386273050, issued on Apr 5, 2020. Check the license (California 20A25773, 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
1386273050
Name
Brian Minh Quan Nguyen
Credential
DO
Primary taxonomy
Glaucoma Specialist (Ophthalmology) Physician 207WX0009X
License number
20A25773 CA
Self-reported in NPPES; status is on the state search
Practice location
2230 Lynn RD Ste 102, Thousand Oaks, CA 91360
Phone
(805) 495-0458
Enumerated
Apr 5, 2020
Record last updated
Jul 24, 2026
Medicare enrollment
Enrolled (PECOS I20250530000480); 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 glaucoma specialist (ophthalmology) physician records → All 70 in California → Look up another NPI →

Also registered at 2230 Lynn RD Ste 102

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

  1. Roy Butera, M.D.Ophthalmology Physician1730205337
  2. Joshua Hedaya, M.D.Ophthalmology Physician1881618023
  3. Pegah Raven, ODOptometrist1447560388
  4. Kristine Shahverdyan, ODOptometrist1316786643

Verify Brian Minh Quan 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 20A25773    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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99% fewer Medicare Part D claims than the average glaucoma specialist (ophthalmology) physician in 2024

34 Medicare Part D claims, against an average of 3,060 among the 430 providers of this specialty who prescribed in Part D.

  1. Brian Nguyen34
  2. Specialty average3,060

Most prescribed

  1. Ofloxacin13 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: $1,090.99

15 payments; by number, the most common kind was food and beverage; the largest payer was Sight Sciences, Inc. The 391 providers of this specialty with any payment received $5,284.60 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Brian Nguyen$1,090.99
  2. Specialty average$5,284.60

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. The Association OF University PhysiciansSeattle, WA

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

Brian Minh Quan Nguyen among 70 glaucoma specialist (ophthalmology) physician records in California

Brian Minh Quan Nguyen, DO is one of 70 glaucoma specialist (ophthalmology) physician records with a practice address in California. 97% 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 83% of them.

  • NPI issued2020 · 83% of these records are older, 6% newer
  • In a Medicare fileYes · 97% of these records are
  • In the CMS Doctors and Clinicians fileYes · 93% of these records are
  • Graduated2021 · median 2013 among the 65 with a school on file
  • Record last updated2026 · 30% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0009X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Glaucoma Specialist (Ophthalmology) Physician providers in California

There are 70 glaucoma specialist (ophthalmology) physician records in California.

All 70 in California → Every provider in Thousand Oaks → Glaucoma Specialist (Ophthalmology) Physician nationwide →

The 8 glaucoma specialist (ophthalmology) physician records with the nearest ZIP codes

  1. Houman Vosoghi, M.D.Westlake Village, CA 913611427279322
  2. Kay Khine, M.D.Pasadena, CA 911071902239528
  3. Sahar Bedrood, MD,PHDPasadena, CA 911061871851923
  4. Olivia Ong, MDMonrovia, CA 910161124021688
  5. Philip Ngai, M.D.West Covina, CA 917901649614215
  6. Stephen Wigginton, M.D.Long Beach, CA 908131568468106
  7. Medi Eslani, MDChula Vista, CA 919111437614310
  8. Morgan Renner, M.D., M.P.HLong Beach, CA 908081649565920

Common questions

What is Brian Minh Quan Nguyen, DO's NPI number?

Brian Minh Quan Nguyen, DO's National Provider Identifier (NPI) is 1386273050, issued on Apr 5, 2020. An NPI identifies a provider in billing; it is not a license.

Where is Brian Minh Quan Nguyen, DO located?

The NPPES record lists a practice address at 2230 Lynn RD Ste 102, Thousand Oaks, CA, 91360. Phone: (805) 495-0458. Providers update this record themselves, so call before visiting.

How can I verify Brian Minh Quan Nguyen, DO's license?

NPPES lists California license number 20A25773, 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 Brian Minh Quan Nguyen, DO prescribe under Medicare Part D?

In 2024, Brian Minh Quan Nguyen, DO had 34 Medicare Part D claims; the average among glaucoma specialist (ophthalmology) physician prescribers was 3,060. 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.