Tam T. Nguyen, M.D.
Family Medicine Physician · Union City, CA
Tam T. Nguyen, M.D. is a family medicine physician with a practice address in Union City, California, and NPI 1093929697, issued on May 10, 2007. Check the license (California A96679, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tam T. Nguyen
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A96679 CA
Self-reported in NPPES; status is on the state search - Practice location
- 33077 Alvarado Niles RD, Union City, CA 94587
- Phone
- (510) 248-1018
- Enumerated
- May 10, 2007
- Record last updated
- Sep 16, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (510) 605-6055
- Medicare enrollment
- Enrolled (PECOS I20081104000109); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 33077 Alvarado Niles RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Georgina Dorkin, FNPFamily Nurse Practitioner1811087109
- Hanisha Geedipally, MDInternal Medicine Physician1407529902
- Kevin Porciuncula, M.D.Family Medicine Physician1629456520
- Rajvir Shahi, MDInternal Medicine Physician1417436056
- Sonia Torres-Ramos, PAPhysician Assistant1346955820
- Hoang Trinh, M.D.Family Medicine Physician1689746927
Verify Tam T. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A96679Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average family medicine physician in 2024
10,015 Medicare Part D claims for 718 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 133 claims were for opioids.
Most prescribed
- Atorvastatin Calcium894 claims
- Losartan Potassium581 claims
- Amlodipine Besylate519 claims
- Metformin Hcl373 claims
- Alendronate Sodium295 claims
- Lisinopril277 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 practice group's MIPS final score for 2023 (Medicare payment program): 86.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $87.02
4 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Washington Township Medical FoundationUnion City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tam T. Nguyen among 17,133 family medicine physician records in California
Tam T. Nguyen, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2005 · median 2005 among the 10,652 with a school on file
- Record last updated2015 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 family medicine physician records list a practice address in Union City
They are 19 of the 1,006 NPPES records with a practice address in Union City, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Union City → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Antonina Bondyasheva, M.D.Union City, CA 945871194982462
- Rudolph Chang, D.O.Union City, CA 945871376835595
- Matthew Eisley, M.D.Union City, CA 945871689810483
- Lynda Kay, M.D.Union City, CA 945871740320183
- Kawalpreet Manku, M.D.Union City, CA 945871851406466
- Abraham Mohmand, M.D.Union City, CA 945871982995494
- Diana Mokaya, M.D.Union City, CA 945871023458528
- Son Lam Nguyen, D.O.Union City, CA 945871093851768
Common questions
What is Tam T. Nguyen, M.D.'s NPI number?
Tam T. Nguyen, M.D.'s National Provider Identifier (NPI) is 1093929697, issued on May 10, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tam T. Nguyen, M.D. located?
The NPPES record lists a practice address at 33077 Alvarado Niles RD, Union City, CA, 94587. Phone: (510) 248-1018. Providers update this record themselves, so call before visiting.
How can I verify Tam T. Nguyen, M.D.'s license?
NPPES lists California license number A96679, 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 Tam T. Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Tam T. Nguyen, M.D. had 10,015 Medicare Part D claims for 718 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Tam T. Nguyen, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.9 of 100, reported for the practice group. 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.