Tuan Xuan Nguyen, MD
Internal Medicine Physician · Garden Grove, CA
Tuan Xuan Nguyen, MD is an internal medicine physician with a practice address in Garden Grove, California, and NPI 1679519821, issued on Jun 22, 2006. Check the license (California A48636, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tuan Xuan Nguyen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A48636 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14221 Euclid St, Garden Grove, CA 92843
- Phone
- (714) 530-2420
- Enumerated
- Jun 22, 2006
- Record last updated
- Oct 15, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (714) 530-2478
- Medicaid ID
- 00A486360 CA
- Medicare enrollment
- Enrolled (PECOS I20041117000624); accepts Medicare assignment
- Medical or professional school
- University Of Oklahoma College Of Medicine, 1989
- 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 14221 Euclid St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Xuyen Huynh, NPFamily Nurse Practitioner1710226139
- An Le, B.A.Mental Health Counselor1255580874
- Dana MakhloufOccupational Therapist1285216713
- Emmanuel Vazquez, PTPhysical Therapist1336998053
Verify Tuan Xuan Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A48636Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.6 times the Medicare Part D claims of the average internal medicine physician in 2024
14,675 Medicare Part D claims for 465 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 229 claims were for opioids.
Most prescribed
- Atorvastatin Calcium995 claims
- Losartan Potassium891 claims
- Amlodipine Besylate823 claims
- Gabapentin550 claims
- Metformin Hcl515 claims
- Triamcinolone Acetonide449 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.
The MIPS final score for 2023 (Medicare payment program): 29.4 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Tuan Xuan Nguyen among 17,696 internal medicine physician records in California
Tuan Xuan Nguyen, MD 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
- Graduated1989 · median 2004 among the 11,065 with a school on file
- Record last updated2018 · 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).
39 internal medicine physician records list a practice address in Garden Grove
They are 39 of the 4,572 NPPES records with a practice address in Garden Grove, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Garden Grove → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Douglas Clark, M.D.Garden Grove, CA 928431780688572
- Asaad Hakim, M.D.Garden Grove, CA 928431477504082
- Julie Hwynn, M.D.Garden Grove, CA 928431780682401
- Shireen Khalife, DOGarden Grove, CA 928431962922393
- Se-Young Lee, M.D.Garden Grove, CA 928431144336967
- Euil Lim, D.OGarden Grove, CA 928431770930828
- Philip Lynn, M.D.Garden Grove, CA 928431326044819
- Hung Nguyen, M.D.Garden Grove, CA 928431538181763
Common questions
What is Tuan Xuan Nguyen, MD's NPI number?
Tuan Xuan Nguyen, MD's National Provider Identifier (NPI) is 1679519821, issued on Jun 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tuan Xuan Nguyen, MD located?
The NPPES record lists a practice address at 14221 Euclid St, Garden Grove, CA, 92843. Phone: (714) 530-2420. Providers update this record themselves, so call before visiting.
How can I verify Tuan Xuan Nguyen, MD's license?
NPPES lists California license number A48636, 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 Tuan Xuan Nguyen, MD prescribe under Medicare Part D?
In 2024, Tuan Xuan Nguyen, MD had 14,675 Medicare Part D claims for 465 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Tuan Xuan Nguyen, MD's MIPS final score?
The 2023 MIPS final score is 29.4 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.