John Chuwon Choi, M.D.
Ophthalmology Physician · Warrenville, IL
John Chuwon Choi, M.D. is an ophthalmology physician with a practice address in Warrenville, Illinois, and NPI 1699765230, issued on Oct 25, 2005. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Chuwon Choi
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- Practice location
- 28375 Davis Pkwy, Warrenville, IL 60555
- Phone
- (630) 836-1616
- Enumerated
- Oct 25, 2005
- Record last updated
- Oct 12, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (630) 836-1612
- Medicare enrollment
- Enrolled (PECOS I20070313000453); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 1990
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Also registered at 28375 Davis Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Chuwon Choi 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
32% fewer Medicare Part D claims than the average ophthalmology physician in 2024
1,025 Medicare Part D claims for 240 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims. 23 claims were for opioids.
Most prescribed
- Erythromycin457 claims
- Restasis113 claims
- Latanoprost85 claims
- Prednisolone Acetate62 claims
- Cyclosporine59 claims
- Doxycycline Monohydrate46 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
John Chuwon Choi among 898 ophthalmology physician records in Illinois
John Chuwon Choi, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1990 · 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 Warrenville → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- James Noth, M.D.Westmont, IL 605591013067669
- Michelle Andreoli, MDNaperville, IL 605631437350212
- Michael Andreoli, M.D.Naperville, IL 605631083909998
- Sachin Jain, M.D.Naperville, IL 605631275832701
- Michael Grassi, MDNaperville, IL 605641689666885
- Brian Igoe, M.D.Riverside, IL 605461841387826
- Marcos Lopez, M.D.North Riverside, IL 605461417967308
- Kathleen Morno, M.D.North Riverside, IL 605461942247770
Common questions
What is John Chuwon Choi, M.D.'s NPI number?
John Chuwon Choi, M.D.'s National Provider Identifier (NPI) is 1699765230, issued on Oct 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Chuwon Choi, M.D. located?
The NPPES record lists a practice address at 28375 Davis Pkwy, Warrenville, IL, 60555. Phone: (630) 836-1616. Providers update this record themselves, so call before visiting.
How can I verify John Chuwon Choi, 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 John Chuwon Choi, M.D. prescribe under Medicare Part D?
In 2024, John Chuwon Choi, M.D. had 1,025 Medicare Part D claims for 240 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is John Chuwon Choi, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.