Vivian Thi Nguyen, OD
Optometrist · Sunnyvale, CA
Vivian Thi Nguyen, OD is an optometrist with a practice address in Sunnyvale, California, and NPI 1164999637, issued on Nov 1, 2018. Check the license (California OPT34087TLG, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Vivian Thi Nguyen
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT34087TLG CA
Self-reported in NPPES; status is on the state search - Practice location
- 596 E EL Camino Real Ste 2, Sunnyvale, CA 94087
- Phone
- (408) 245-6212
- Enumerated
- Nov 1, 2018
- Record last updated
- Nov 1, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190111002804); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 596 E EL Camino Real Ste 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Ang, O.D.Optometrist1205677275
- Spencer Lee, ODOptometrist1902384092
Verify Vivian Thi 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 OPT34087TLGCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average optometrist in 2024
46 Medicare Part D claims for 34 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D.
Most prescribed
- Erythromycin18 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: $125.04
1 payment: food and beverage; the largest payer was Johnson & Johnson Vision Care, 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.
Bills Medicare through one group practice
- Permanente Medical Group IncElk Grove, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vivian Thi Nguyen among 8,308 optometrist records in California
Vivian Thi Nguyen, OD 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 2018, is newer than 79% of them.
- NPI issued2018 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2018 · median 2008 among the 3,573 with a school on file
- Record last updated2018 · 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).
43 optometrist records list a practice address in Sunnyvale
They are 43 of the 1,690 NPPES records with a practice address in Sunnyvale, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Sunnyvale → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Aileen Chang, O.D.Sunnyvale, CA 940871356781785
- Vanessa Hoang, O.D.Sunnyvale, CA 940871801821202
- Vaughn Hoglan, O.D.Sunnyvale, CA 940871154547727
- Jeffrey Holbert, O.D.Sunnyvale, CA 940871023352176
- Mark Ichikawa, O.D.Sunnyvale, CA 940871285665992
- Jesley Johnson, O.D.Sunnyvale, CA 940871265792253
- Yeun Hwa Lee, ODSunnyvale, CA 940871780918094
- Lorina Leung, O.D.Sunnyvale, CA 940871669666533
Common questions
What is Vivian Thi Nguyen, OD's NPI number?
Vivian Thi Nguyen, OD's National Provider Identifier (NPI) is 1164999637, issued on Nov 1, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Vivian Thi Nguyen, OD located?
The NPPES record lists a practice address at 596 E EL Camino Real Ste 2, Sunnyvale, CA, 94087. Phone: (408) 245-6212. Providers update this record themselves, so call before visiting.
How can I verify Vivian Thi Nguyen, OD's license?
NPPES lists California license number OPT34087TLG, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Vivian Thi Nguyen, OD prescribe under Medicare Part D?
In 2024, Vivian Thi Nguyen, OD had 46 Medicare Part D claims for 34 beneficiaries; the average among optometrist prescribers was 277. 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.