Alan Y. Chow, M.D.
Ophthalmology Physician · Glen Ellyn, IL
Alan Y. Chow, M.D. is an ophthalmology physician with a practice address in Glen Ellyn, Illinois, and NPI 1891802096, issued on Aug 24, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alan Y. Chow
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- Practice location
- 386 Pennsylvania Ave Ste 3N, Glen Ellyn, IL 60137
- Phone
- (630) 858-4411
- Enumerated
- Aug 24, 2006
- Record last updated
- Oct 31, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (630) 858-4793
- Medicare enrollment
- Enrolled (PECOS I20061205000115); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Verify Alan Y. Chow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average ophthalmology physician in 2024
389 Medicare Part D claims for 63 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 40% of claims.
Most prescribed
- Latanoprost183 claims
- Timolol Maleate119 claims
- Brimonidine Tartrate26 claims
- Dorzolamide Hcl15 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.
Alan Y. Chow among 898 ophthalmology physician records in Illinois
Alan Y. Chow, M.D. is one of 898 ophthalmology physician records with a practice address in Illinois. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 44% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1976 · median 1999 among the 551 with a school on file
- Record last updated2007 · 60% 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 Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Illinois
There are 898 ophthalmology physician records in Illinois.
All 898 in Illinois → Every provider in Glen Ellyn → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Kim Lindenmuth, M.D.Glen Ellyn, IL 601371710052287
- Arun Samy, MDGlen Ellyn, IL 601371649277724
- Norbert Becker, MDGeneva, IL 601341629060892
- Katherine Brito, MDGeneva, IL 601341235371741
- Olga German, M.D.Geneva, IL 601341346635331
- Anjali Hawkins, MD PHDGeneva, IL 601341669474003
- Kevin King, MDGeneva, IL 601341386636538
- Ronald Simone, MDGeneva, IL 601341144212655
Common questions
What is Alan Y. Chow, M.D.'s NPI number?
Alan Y. Chow, M.D.'s National Provider Identifier (NPI) is 1891802096, issued on Aug 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Alan Y. Chow, M.D. located?
The NPPES record lists a practice address at 386 Pennsylvania Ave Ste 3N, Glen Ellyn, IL, 60137. Phone: (630) 858-4411. Providers update this record themselves, so call before visiting.
How can I verify Alan Y. Chow, M.D.'s license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alan Y. Chow, M.D. prescribe under Medicare Part D?
In 2024, Alan Y. Chow, M.D. had 389 Medicare Part D claims for 63 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.