Wendy Ni Ahn, OD
Optometrist · Los Altos, CA
Wendy Ni Ahn, OD is an optometrist with a practice address in Los Altos, California, and NPI 1932324670, issued on Apr 16, 2007. Check the license (California 12738T, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Wendy Ni Ahn
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 12738T CA
Self-reported in NPPES; status is on the state search - Practice location
- 261 Main St, Los Altos, CA 94022
- Phone
- (650) 947-3937
- Enumerated
- Apr 16, 2007
- Record last updated
- Apr 4, 2024
- Fax
- (650) 947-3935
- Medicare enrollment
- Enrolled (PECOS I20091002000337); accepts Medicare assignment
- Medical or professional school
- University Of California - School Of Optometry, 2003
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify Wendy Ni Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 12738TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average optometrist in 2024
40 Medicare Part D claims for 12 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 78% of claims.
Most prescribed
- Restasis13 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: $167.67
3 payments; by number, the most common kind was food and beverage; the largest payer was RxSight 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.
Wendy Ni Ahn among 8,308 optometrist records in California
Wendy Ni Ahn, 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 2007, is newer than 34% of them.
- NPI issued2007 · 34% of these records are older, 46% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2003 · median 2008 among the 3,573 with a school on file
- Record last updated2024 · 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).
15 optometrist records list a practice address in Los Altos
They are 15 of the 718 NPPES records with a practice address in Los Altos, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Los Altos → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Audrey Chu, ODLos Altos, CA 940221770005183
- Andrea Dong, O.D.Los Altos, CA 940221730244682
- Lisa Lo, O.D.Los Altos, CA 940221851691778
- Annie Low, O.D.Los Altos, CA 940221366778839
- Kira Majmundar, ODLos Altos, CA 940221558080580
- Aaron Neufeld, O.D.Los Altos, CA 940221194107763
- Jabina Ramde, O.D.Los Altos, CA 940221679684047
- Kathleen Shen, ODLos Altos, CA 940221336113372
Common questions
What is Wendy Ni Ahn, OD's NPI number?
Wendy Ni Ahn, OD's National Provider Identifier (NPI) is 1932324670, issued on Apr 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Wendy Ni Ahn, OD located?
The NPPES record lists a practice address at 261 Main St, Los Altos, CA, 94022. Phone: (650) 947-3937. Providers update this record themselves, so call before visiting.
How can I verify Wendy Ni Ahn, OD's license?
NPPES lists California license number 12738T, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Wendy Ni Ahn, OD prescribe under Medicare Part D?
In 2024, Wendy Ni Ahn, OD had 40 Medicare Part D claims for 12 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.