Ken Nguyen, D.O.
Emergency Medicine Physician · Rialto, CA
Ken Nguyen, D.O. is an emergency medicine physician with a practice address in Rialto, California, and NPI 1851351894, issued on Mar 24, 2006. Check the license (California 20A8914, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ken Nguyen
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A8914 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1851 N Riverside Ave, Rialto, CA 92376
- Phone
- (909) 874-2371
- Enumerated
- Mar 24, 2006
- Record last updated
- Feb 19, 2026
- Medicaid ID
- 00AX69140 CA
- Medicare enrollment
- Enrolled (PECOS I20050630001175); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1851 N Riverside Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sophia Beyene, DOFamily Medicine Physician1861454993
- Adrienne Burn, FNPFamily Nurse Practitioner1700160546
- Camille Chano, MDFamily Medicine Physician1083029425
- Linnea Chaves, RN FNPFamily Nurse Practitioner1992115018
Verify Ken Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8914Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.1 times the Medicare Part D claims of the average emergency medicine physician in 2024
1,151 Medicare Part D claims for 764 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass168 claims
- Ibuprofen127 claims
- Nitrofurantoin Mono-Macro83 claims
- Sulfamethoxazole-Trimethoprim71 claims
- Cephalexin62 claims
- Ciprofloxacin Hcl59 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.
Industry payments in 2024: $73.17
4 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 12,335 providers of this specialty with any payment received $953.79 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 2 group practices
- Beaver Medical Group P CSan Bernardino, CA
- Pinnacle Medical Group IncRialto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ken Nguyen among 7,751 emergency medicine physician records in California
Ken Nguyen, D.O. 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1995 · median 2011 among the 4,560 with a school on file
- Record last updated2026 · 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).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Rialto → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Ayad Makar, M.D.Rialto, CA 923761265491765
- Michael Allen, D.O.Redlands, CA 923731508216532
- Salomon Alvarado, DORedlands, CA 923731710616404
- Deborah Behringer, MDRedlands, CA 923731003094699
- Jonathan Bolton, M.D.Redlands, CA 923731053329466
- David Chang, M.D.Redlands, CA 923731972515252
- Asim Iqbal, D.O.Redlands, CA 923731568820306
- Pha Le, D.O.Redlands, CA 923731184631954
Common questions
What is Ken Nguyen, D.O.'s NPI number?
Ken Nguyen, D.O.'s National Provider Identifier (NPI) is 1851351894, issued on Mar 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ken Nguyen, D.O. located?
The NPPES record lists a practice address at 1851 N Riverside Ave, Rialto, CA, 92376. Phone: (909) 874-2371. Providers update this record themselves, so call before visiting.
How can I verify Ken Nguyen, D.O.'s license?
NPPES lists California license number 20A8914, 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 Ken Nguyen, D.O. prescribe under Medicare Part D?
In 2024, Ken Nguyen, D.O. had 1,151 Medicare Part D claims for 764 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.