Aileen Sy
Ophthalmology Physician · Santa Clara, CA
Aileen Sy is an ophthalmology physician with a practice address in Santa Clara, California, and NPI 1801152327, issued on Apr 9, 2012. Check the license (California A128835, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Aileen Sy
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A128835 CA
Self-reported in NPPES; status is on the state search - Practice location
- 710 Lawrence Expy Dept 490, Santa Clara, CA 95051
- Phone
- (408) 851-4100
- Enumerated
- Apr 9, 2012
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20161230001379); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 710 Lawrence Expy Dept 490
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Felise May Barte, MDGlaucoma Specialist (Ophthalmology) Physician1467658062
- Ricky Cui, MDGlaucoma Specialist (Ophthalmology) Physician1821592049
Verify Aileen Sy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A128835Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,425 Medicare Part D claims for 403 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Latanoprost367 claims
- Prednisolone Acetate201 claims
- Dorzolamide-Timolol176 claims
- Brimonidine Tartrate122 claims
- Timolol Maleate121 claims
- Polymyxin B Sul-Trimethoprim109 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
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aileen Sy among 2,899 ophthalmology physician records in California
Aileen Sy is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 78% of them.
- NPI issued2012 · 78% of these records are older, 20% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2012 · median 2001 among the 1,907 with a school on file
- Record last updated2021 · 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 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Santa Clara → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Christine Benador-Shen, MDSanta Clara, CA 950511710370424
- Daniel Fourrier, MDSanta Clara, CA 950511770669608
- Deborah Gill, M.D.Santa Clara, CA 950511346353406
- Stuart Greene, MDSanta Clara, CA 950511144307091
- Huck Holz, M.D.Santa Clara, CA 950511821069394
- Rubin Kim, MDSanta Clara, CA 950511033296967
- Jason Lauffer, MDSanta Clara, CA 950511366529208
- Jason Lee, M.D.Santa Clara, CA 950511881898658
Common questions
What is Aileen Sy's NPI number?
Aileen Sy's National Provider Identifier (NPI) is 1801152327, issued on Apr 9, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Aileen Sy located?
The NPPES record lists a practice address at 710 Lawrence Expy Dept 490, Santa Clara, CA, 95051. Phone: (408) 851-4100. Providers update this record themselves, so call before visiting.
How can I verify Aileen Sy's license?
NPPES lists California license number A128835, 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 Aileen Sy prescribe under Medicare Part D?
In 2024, Aileen Sy had 1,425 Medicare Part D claims for 403 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.