Margaret Nguyen
Optometrist · Downey, CA
Margaret Nguyen is an optometrist with a practice address in Downey, California, and NPI 1831547009, issued on May 29, 2016. Check the license (California 15428, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret Nguyen
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 15428 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9001 Apollo Way, Downey, CA 90242
- Phone
- (562) 803-0135
- Enumerated
- May 29, 2016
- Record last updated
- Mar 26, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (562) 803-0384
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Margaret Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 15428Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $163.53
3 payments; by number, the most common kind was food and beverage; the largest payer was Bausch & Lomb Americas Inc. The 34,453 providers of this specialty with any payment received $769.99 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.
Margaret Nguyen among 8,308 optometrist records in California
Margaret Nguyen is one of 8,308 optometrist records with a practice address in California. 67% 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 73% of them.
- NPI issued2016 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2019 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in California
There are 8,308 optometrist records in California.
All 8,308 in California → Every provider in Downey → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Jillyn Amoroso, ODDowney, CA 902421174053011
- Samantha Carrillo, ODDowney, CA 902421194661942
- Toseef Khan, O.D.Downey, CA 902421982848289
- Cindy Lee, O.D.Downey, CA 902421417000795
- Emily Ahn, O.D.Downey, CA 902411508170390
- Mabel Cheung, O.D.Downey, CA 902411912308487
- Michael Cohen, O.D.Downey, CA 902411487866414
- Laura DaoDowney, CA 902411467981928
Common questions
What is Margaret Nguyen's NPI number?
Margaret Nguyen's National Provider Identifier (NPI) is 1831547009, issued on May 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Nguyen located?
The NPPES record lists a practice address at 9001 Apollo Way, Downey, CA, 90242. Phone: (562) 803-0135. Providers update this record themselves, so call before visiting.
How can I verify Margaret Nguyen's license?
NPPES lists California license number 15428, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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.