Quoc B. Nguyen, M.D., M.P.H
Internal Medicine Physician · Brea, CA
Quoc B. Nguyen, M.D., M.P.H is an internal medicine physician with a practice address in Brea, California, and NPI 1043240450, issued on Jul 3, 2006. Check the license (California A94436, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Quoc B. Nguyen
- Credential
- M.D., M.P.H
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A94436 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1900 E Lambert RD, Brea, CA 92821
- Phone
- (714) 672-5100
- Enumerated
- Jul 3, 2006
- Record last updated
- Dec 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 672-5029
- Medicare enrollment
- Enrolled (PECOS I20061108000307); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1900 E Lambert RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ellen Ji, DOFamily Medicine Physician1417418229
- Kevin Liao, D.O.Family Medicine Physician1811148620
- Sophia Lim, M.D.Student in an Organized Health Care Education/Training Program1962857532
- David Liu, M.D.Family Medicine Physician1013072149
Verify Quoc B. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94436Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% more Medicare Part D claims than the average internal medicine physician in 2024
4,571 Medicare Part D claims for 609 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 165 claims were for opioids.
Most prescribed
- Atorvastatin Calcium408 claims
- Amlodipine Besylate219 claims
- Lisinopril169 claims
- Jardiance142 claims
- Rosuvastatin Calcium126 claims
- Losartan Potassium124 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Quoc B. Nguyen among 17,696 internal medicine physician records in California
Quoc B. Nguyen, M.D., M.P.H is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Brea → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pearl D'Sa, M.D.Brea, CA 928211942233671
- Franklin Dawes, M.D.Brea, CA 928211295760007
- Edward Hutchison, M.D.Brea, CA 928211912982026
- Aeri Kang, M.D.Brea, CA 928211689660755
- Paulynne Liang, MDBrea, CA 928211093700064
- Siera Panhwar, M.D.Brea, CA 928211790863306
- Nadia Tadros, M.D.Brea, CA 928211548467210
- Elizabeth Cheng, MDAnaheim, CA 928171013278449
Common questions
What is Quoc B. Nguyen, M.D., M.P.H's NPI number?
Quoc B. Nguyen, M.D., M.P.H's National Provider Identifier (NPI) is 1043240450, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Quoc B. Nguyen, M.D., M.P.H located?
The NPPES record lists a practice address at 1900 E Lambert RD, Brea, CA, 92821. Phone: (714) 672-5100. Providers update this record themselves, so call before visiting.
How can I verify Quoc B. Nguyen, M.D., M.P.H's license?
NPPES lists California license number A94436, 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 Quoc B. Nguyen, M.D., M.P.H prescribe under Medicare Part D?
In 2024, Quoc B. Nguyen, M.D., M.P.H had 4,571 Medicare Part D claims for 609 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.