Gregory Lucien Fenton, M.D.
Ophthalmology Physician · Wheaton, IL
Gregory Lucien Fenton, M.D. is an ophthalmology physician with a practice address in Wheaton, Illinois, and NPI 1114136959, issued on May 21, 2007. Check the license (Illinois 036124435, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gregory Lucien Fenton
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 036124435 IL
MT185909 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2015 N Main St, Wheaton, IL 60187
- Phone
- (630) 668-8250
- Enumerated
- May 21, 2007
- Record last updated
- Oct 5, 2022
- Fax
- (630) 668-8916
- Medicaid ID
- 036124435 IL
- Medicare enrollment
- Enrolled (PECOS I20101008000966); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 2004
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Also registered at 2015 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan Anderson-Nelson, M.D.Retina Specialist (Ophthalmology) Physician1013904986
- Christina Andrzejewski, ODOptometrist1235922089
- Ayesha Badar, MDGlaucoma Specialist (Ophthalmology) Physician1619462330
- Saaquib Bakhsh, MDRetina Specialist (Ophthalmology) Physician1457871402
- Kimberly Blankshain, MDNeuro-ophthalmology Physician1801328125
- Eric CaskeyNeuro-ophthalmology Physician1558892729
Verify Gregory Lucien Fenton in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036124435Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average ophthalmology physician in 2024
954 Medicare Part D claims for 239 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 53% of claims.
Most prescribed
- Prednisolone Acetate394 claims
- Ketorolac Tromethamine180 claims
- Moxifloxacin93 claims
- Dorzolamide-Timolol85 claims
- Bromfenac Sodium21 claims
- Latanoprost21 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.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Wheaton Eye Clinic LtdWheaton, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Lucien Fenton among 898 ophthalmology physician records in Illinois
Gregory Lucien Fenton, 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 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 36% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2004 · median 1999 among the 551 with a school on file
- Record last updated2022 · 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 Wheaton → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Peter Brazis, M.D.Wheaton, IL 601871811984669
- Mark Daily, M. D.Wheaton, IL 601871295723120
- Richard Gieser, M.D.Wheaton, IL 601871215924485
- David Gieser, M.D.Wheaton, IL 601871992793822
- Stephen Gieser, M.D.Wheaton, IL 601871851389787
- Jeffrey Haag, M.D.Wheaton, IL 601871255320180
- Steven Lafayette, MDWheaton, IL 601871770572679
- Mary Mehaffey, M.D.Wheaton, IL 601871649269580
Common questions
What is Gregory Lucien Fenton, M.D.'s NPI number?
Gregory Lucien Fenton, M.D.'s National Provider Identifier (NPI) is 1114136959, issued on May 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Lucien Fenton, M.D. located?
The NPPES record lists a practice address at 2015 N Main St, Wheaton, IL, 60187. Phone: (630) 668-8250. Providers update this record themselves, so call before visiting.
How can I verify Gregory Lucien Fenton, M.D.'s license?
NPPES lists Illinois license number 036124435, as entered by the provider. 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 Gregory Lucien Fenton, M.D. prescribe under Medicare Part D?
In 2024, Gregory Lucien Fenton, M.D. had 954 Medicare Part D claims for 239 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Gregory Lucien Fenton, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.