Elizabeth Nguyen, MD
Emergency Medicine Physician · Walnut Creek, CA
Elizabeth Nguyen, MD is an emergency medicine physician with a practice address in Walnut Creek, California, and NPI 1639532344, issued on Mar 30, 2016. Check the license (California A151962, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Elizabeth Nguyen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A151962 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 S Main St, Walnut Creek, CA 94596
- Phone
- (415) 508-8042
- Enumerated
- Mar 30, 2016
- Record last updated
- Sep 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20181010001652); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1425 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Aaron Mark Acosta, DOEmergency Medicine Physician1538789987
- Basil Adad, MDOtolaryngology Physician1487732574
- Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804
Verify Elizabeth Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A151962Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average emergency medicine physician in 2024
291 Medicare Part D claims for 177 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Cefadroxil36 claims
- Ondansetron Odt29 claims
- Amoxicillin-Clavulanate Potass19 claims
- Hydrocodone-Acetaminophen17 claims
- Cefpodoxime Proxetil12 claims
- Oxycodone Hcl11 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): 100 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).
Bills Medicare through one group practice
- Palomar Emergency Physicians, IncPoway, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Elizabeth Nguyen among 7,751 emergency medicine physician records in California
Elizabeth Nguyen, MD is one of 7,751 emergency 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 2016, is newer than 75% of them.
- NPI issued2016 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2016 · median 2011 among the 4,560 with a school on file
- Record last updated2023 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
95 emergency medicine physician records list a practice address in Walnut Creek
They are 95 of the 6,170 NPPES records with a practice address in Walnut Creek, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Walnut Creek → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Peter Barnett, M.D.Walnut Creek, CA 945961699882589
- Brian Baskin, MDWalnut Creek, CA 945961770554693
- Peter Benson, M.D.Walnut Creek, CA 945961487680393
- Scott Chamberlain, M.D.Walnut Creek, CA 945961356395453
- Charles Hansen, MDWalnut Creek, CA 945961891873956
- Christopher Jaksa, MDWalnut Creek, CA 945961619055779
- Conrad Lai, M.DWalnut Creek, CA 945961942248141
- Hannon Patel, MDWalnut Creek, CA 945961336227495
Common questions
What is Elizabeth Nguyen, MD's NPI number?
Elizabeth Nguyen, MD's National Provider Identifier (NPI) is 1639532344, issued on Mar 30, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Elizabeth Nguyen, MD located?
The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (415) 508-8042. Providers update this record themselves, so call before visiting.
How can I verify Elizabeth Nguyen, MD's license?
NPPES lists California license number A151962, 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 Elizabeth Nguyen, MD prescribe under Medicare Part D?
In 2024, Elizabeth Nguyen, MD had 291 Medicare Part D claims for 177 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Elizabeth Nguyen, MD's MIPS final score?
The 2023 MIPS final score is 100 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.