Carmen Yu
Optometrist · Antioch, CA
Carmen Yu is an optometrist with a practice address in Antioch, California, and NPI 1619433745, issued on Feb 13, 2019. Check the license (California 34377TLG, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Carmen Yu
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- 34377TLG CA
191583 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4893 Lone Tree Way, Antioch, CA 94531
- Phone
- (925) 978-0615
- Enumerated
- Feb 13, 2019
- Record last updated
- Feb 3, 2022
- Medicare enrollment
- Enrolled (PECOS I20220119001695); accepts Medicare assignment
- Medical or professional school
- International American University At Puerto Rico - School Of Optometry, 2019
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 4893 Lone Tree Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jenny BuiPharmacist1235601402
- Khanh Hoang, O.D.Optometrist1730207168
- Somaia Nassef, O.D.Optometrist1578016457
Verify Carmen Yu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 34377TLGCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average optometrist in 2024
16 Medicare Part D claims for 14 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D.
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
- Permanente Medical Group IncAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carmen Yu among 8,308 optometrist records in California
Carmen Yu 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 2019, is newer than 81% of them.
- NPI issued2019 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2019 · median 2008 among the 3,573 with a school on file
- Record last updated2022 · 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).
24 optometrist records list a practice address in Antioch
They are 24 of the 2,184 NPPES records with a practice address in Antioch, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Antioch → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Monique Bennett, ODAntioch, CA 945311891489639
- Estella BowlsbyAntioch, CA 945311508296633
- Doris Chang, O.D.Antioch, CA 945311720120769
- Cynthia Hamblin, ODAntioch, CA 945311639602527
- Khanh Hoang, O.D.Antioch, CA 945311730207168
- Eileen Linder, O.D.Antioch, CA 945311366584302
- Michele Lomelino Valencia, O.D.Antioch, CA 945311457697799
- Somaia Nassef, O.D.Antioch, CA 945311578016457
Common questions
What is Carmen Yu's NPI number?
Carmen Yu's National Provider Identifier (NPI) is 1619433745, issued on Feb 13, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Carmen Yu located?
The NPPES record lists a practice address at 4893 Lone Tree Way, Antioch, CA, 94531. Phone: (925) 978-0615. Providers update this record themselves, so call before visiting.
How can I verify Carmen Yu's license?
NPPES lists California license number 34377TLG, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Carmen Yu prescribe under Medicare Part D?
In 2024, Carmen Yu had 16 Medicare Part D claims for 14 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.