Andrew Nguyen, MD
Rheumatology Physician · Riverside, CA
Andrew Nguyen, MD is a rheumatology physician with a practice address in Riverside, California, and NPI 1366590291, issued on Jan 8, 2007. Check the license (California 20A8400, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Andrew Nguyen
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A8400 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10800 Magnolia Ave, Riverside, CA 92505
- Phone
- (909) 353-2000
- Enumerated
- Jan 8, 2007
- Entity
- Type 1 · individual
Also registered at 10800 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joseph Abapo, MDPediatrics Physician1841348786
- Hussein Abdulrassoul, MDOrthopaedic Surgery Physician1972123891
- Kimberly Adams, PA-CMedical Physician Assistant1053522870
- Alfredo Aguiar, PAPhysician Assistant1043368970
- Michael Aguinaldo, M.D.Pediatrics Physician1851531487
- Maria Aguirre, MDPediatrics Physician1295806255
Verify Andrew Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A8400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
13% more Medicare Part D claims than the average rheumatology physician in 2024
2,237 Medicare Part D claims for 516 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 139 claims were for opioids.
Most prescribed
- Methotrexate361 claims
- Hydroxychloroquine Sulfate288 claims
- Prednisone241 claims
- Amjevita(Cf) Autoinjector146 claims
- Enbrel104 claims
- Hydrocodone-Acetaminophen102 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: $266.74
3 payments; by number, the most common kind was food and beverage; the largest payer was Actelion Pharmaceuticals US, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
Other rheumatology physician records in California
- Khurram Abbass, MDSan Jose, CA1154455178
- Mai Abdelnabi, MDSan Francisco, CA1013394980
- Brian Abe, MD, PHDStanford, CA1104262708
- Thomas Abel, MDMonte Sereno, CA1871679399
- Feruza AbraamyanRoseville, CA1124769278
- Thomas Adamson, M.D.San Diego, CA1639187057
- Sana Afroz, MDMoreno Valley, CA1356724074
- Ishita Aggarwal, MDSan Francisco, CA1518385699
- Atul Agrawal, MDAntioch, CA1528146016
- Bikramjit Ahluwalia, MDApple Valley, CA1669402467
Common questions
What is Andrew Nguyen, MD's NPI number?
Andrew Nguyen, MD's National Provider Identifier (NPI) is 1366590291, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Nguyen, MD located?
The NPPES record lists a practice address at 10800 Magnolia Ave, Riverside, CA, 92505. Phone: (909) 353-2000. Providers update this record themselves, so call before visiting.
How can I verify Andrew Nguyen, MD's license?
NPPES lists California license number 20A8400, 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 Andrew Nguyen, MD prescribe under Medicare Part D?
In 2024, Andrew Nguyen, MD had 2,237 Medicare Part D claims for 516 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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 27, 2026.