Chau Lien Nguyen, D.O.
Rheumatology Physician · Long Beach, CA
Chau Lien Nguyen, D.O. is a rheumatology physician with a practice address in Long Beach, California, and NPI 1861718397, issued on Apr 8, 2010. Check the license (California 20A11904, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chau Lien Nguyen
- Credential
- D.O.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A11904 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2699 Atlantic Ave, Long Beach, CA 90806
- Phone
- (562) 426-3333
- Enumerated
- Apr 8, 2010
- Record last updated
- Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150922002534); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 2699 Atlantic Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joilyn AndersonFamily Nurse Practitioner1114557170
- Mark Asbill, M.D.Internal Medicine Physician1558310896
- Renuka Boyapalli, MDEndocrinology, Diabetes & Metabolism Physician1558399311
- Lauren Choi, M.D.Endocrinology, Diabetes & Metabolism Physician1699736132
- Jeffrey Chwa, DORheumatology Physician1285989236
- Anthony Chyou, M. D.Interventional Cardiology Physician1457592073
Verify Chau Lien Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A11904Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,797 Medicare Part D claims for 302 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 67 claims were for opioids.
Most prescribed
- Methotrexate280 claims
- Prednisone227 claims
- Enbrel Sureclick137 claims
- Hydroxychloroquine Sulfate130 claims
- Leflunomide120 claims
- Enbrel104 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupGardena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chau Lien Nguyen among 926 rheumatology physician records in California
Chau Lien Nguyen, D.O. is one of 926 rheumatology 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 2010, is newer than 66% of them.
- NPI issued2010 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2010 · median 2003 among the 641 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Long Beach → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Jeffrey Chwa, DOLong Beach, CA 908061285989236
- Joshpaul Dhillon, MDLong Beach, CA 908061942706825
- Nathaniel Neal, M.D.Long Beach, CA 908061720006729
- Geoffrey Dolan, MDLong Beach, CA 908081811910847
- Noreen Hussaini, M.D.Long Beach, CA 908081093907198
- Nancy Godfrey, M.D.Long Beach, CA 908151790777449
- Michael Maehara, M.D.Long Beach, CA 908151316969629
- Jeremy Anuntiyo, MDSan Pedro, CA 907321811183585
Common questions
What is Chau Lien Nguyen, D.O.'s NPI number?
Chau Lien Nguyen, D.O.'s National Provider Identifier (NPI) is 1861718397, issued on Apr 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Chau Lien Nguyen, D.O. located?
The NPPES record lists a practice address at 2699 Atlantic Ave, Long Beach, CA, 90806. Phone: (562) 426-3333. Providers update this record themselves, so call before visiting.
How can I verify Chau Lien Nguyen, D.O.'s license?
NPPES lists California license number 20A11904, 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 Chau Lien Nguyen, D.O. prescribe under Medicare Part D?
In 2024, Chau Lien Nguyen, D.O. had 1,797 Medicare Part D claims for 302 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), 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.