Reginald Nguyen, MD
Emergency Medicine Physician · Mountain View, CA
Reginald Nguyen, MD is an emergency medicine physician with a practice address in Mountain View, California, and NPI 1144859752, issued on Apr 6, 2020. Check the license (California A189843, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Reginald Nguyen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A189843 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2500 Grant RD, Mountain View, CA 94040
- Phone
- (650) 940-7055
- Enumerated
- Apr 6, 2020
- Record last updated
- Nov 14, 2024
- Medicare enrollment
- Enrolled (PECOS I20231201002531); accepts Medicare assignment
- Medical or professional school
- Oakland Univ, William Beaumont School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 2500 Grant RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yolande AbotchiMedical-Surgical Registered Nurse1306733902
- Mohanad AlazzehEmergency Medicine Physician1285253799
- Clarence Allegakoen, M.D.Internal Medicine Physician1205909637
- Katrina BarnettEmergency Medicine Physician1952314510
- Victoria Bartret, M.D.Emergency Medicine Physician1508200890
- Philippe Begin, M.D.Allergy & Immunology Physician1386065902
Verify Reginald Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A189843Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average emergency medicine physician in 2024
112 Medicare Part D claims for 90 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
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 2 group practices
- Cep America - CaliforniaMountain View, CA
- Permanente Medical Group IncSan Leandro, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Reginald Nguyen among 7,751 emergency medicine physician records in California
Reginald 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 2020, is newer than 88% of them.
- NPI issued2020 · 88% of these records are older, 8% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2020 · median 2011 among the 4,560 with a school on file
- Record last updated2024 · 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).
28 emergency medicine physician records list a practice address in Mountain View
They are 28 of the 2,467 NPPES records with a practice address in Mountain View, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Mountain View → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Joan Burg, M.DMountain View, CA 940401962457200
- Erik Davenport, M.DMountain View, CA 940401598702714
- Jonathan Engelhardt, MDMountain View, CA 940401003897117
- Dan Fox, M.DMountain View, CA 940401164477428
- Alan Gladman, M.DMountain View, CA 940401073568333
- Lauren Grossman, MDMountain View, CA 940401891771168
- Jonathan Kenyon, M.DMountain View, CA 940401881631406
- Gary Klapman, M.DMountain View, CA 940401467407692
Common questions
What is Reginald Nguyen, MD's NPI number?
Reginald Nguyen, MD's National Provider Identifier (NPI) is 1144859752, issued on Apr 6, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Reginald Nguyen, MD located?
The NPPES record lists a practice address at 2500 Grant RD, Mountain View, CA, 94040. Phone: (650) 940-7055. Providers update this record themselves, so call before visiting.
How can I verify Reginald Nguyen, MD's license?
NPPES lists California license number A189843, 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 Reginald Nguyen, MD prescribe under Medicare Part D?
In 2024, Reginald Nguyen, MD had 112 Medicare Part D claims for 90 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.