NPPES file of Aug 9, 2026

Tien Nguyen, M.D

Vascular Surgery Physician · Bakersfield, CA

Tien Nguyen, M.D is a vascular surgery physician with a practice address in Bakersfield, California, and NPI 1013923481, issued on Jul 31, 2006. Check the license (California A91766, 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1013923481
Name
Tien Nguyen
Credential
M.D
Primary taxonomy
Vascular Surgery Physician 2086S0129X
License number
A91766 CA
Self-reported in NPPES; status is on the state search
Practice location
4901 Centennial Plaza Way, Bakersfield, CA 93312
Phone
(661) 588-1150
Enumerated
Jul 31, 2006
Record last updated
Jun 2, 2011 (not updated in 15 years: call before relying on the address or phone)
Fax
(661) 241-4052
Medicare enrollment
Enrolled (PECOS I20110822000232); may accept Medicare assignment
Medical or professional school
University Of California, San Diego School Of Medicine, 2003
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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Also registered at 4901 Centennial Plaza Way

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

  1. Hao BuiVascular Surgery Physician1649493750
  2. Allan Capote, M.D.Vascular Surgery Physician1124385158
  3. Yazen Qumsiyeh, MDVascular Surgery Physician1518462050

Verify Tien 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 A91766
    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

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2.4 times the Medicare Part D claims of the average vascular surgery physician in 2024

474 Medicare Part D claims for 281 beneficiaries, against an average of 201 among the 3,936 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 67 claims were for opioids.

  1. Tien Nguyen474
  2. Specialty average201

Most prescribed

  1. Clopidogrel158 claims
  2. Alprazolam111 claims
  3. Hydrocodone-Acetaminophen35 claims
  4. Acetaminophen-Codeine29 claims
  5. Clonazepam28 claims
  6. Cephalexin20 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): 19.5 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.

  1. Qualityout of 100 · 30% of the final score0.0
  2. Costout of 100 · 30%65.0
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities0 of 40 points · 15%0.0

Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $339.60

19 payments; by number, the most common kind was food and beverage; the largest payer was Smith+Nephew, Inc. The 4,059 providers of this specialty with any payment received $6,178.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Tien Nguyen$339.60
  2. Specialty average$6,178.00

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. Hao D Bui MD IncBakersfield, CA

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

Vascular Surgery Physician providers in California

There are 580 vascular surgery physician records in California.

Other vascular surgery physician records in California

  1. Oliver Aalami, M.D.Stanford, CA1225229024
  2. Shahram Aarabi, MDOakland, CA1972700458
  3. Arad Abadi, MDLancaster, CA1730673724
  4. Ryan Abdul-HaqqWest Hollywood, CA1386087864
  5. Andrew Abi-Chaker, M.D.Sherman Oaks, CA1528488467
  6. Ahmed Abou-Zamzam, M.D.Loma Linda, CA1558306795
  7. Joseph Abu-Dalu, MDLos Angeles, CA1821157587
  8. Queen Abure, MDSan Francisco, CA1710772074
  9. Riad Adoumie, M.D.Torrance, CA1467465930
  10. Massoud Agahi, M.D.Beverly Hills, CA1952367070

Common questions

What is Tien Nguyen, M.D's NPI number?

Tien Nguyen, M.D's National Provider Identifier (NPI) is 1013923481, issued on Jul 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Tien Nguyen, M.D located?

The NPPES record lists a practice address at 4901 Centennial Plaza Way, Bakersfield, CA, 93312. Phone: (661) 588-1150. Providers update this record themselves, so call before visiting.

How can I verify Tien Nguyen, M.D's license?

NPPES lists California license number A91766, 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 Tien Nguyen, M.D prescribe under Medicare Part D?

In 2024, Tien Nguyen, M.D had 474 Medicare Part D claims for 281 beneficiaries; the average among vascular surgery physician prescribers was 201. Part D covers Medicare prescriptions only.

What is Tien Nguyen, M.D's MIPS final score?

The 2023 MIPS final score is 19.5 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.