William C. Park, M.D.
Ophthalmology Physician · Aurora, IL
William C. Park, M.D. is an ophthalmology physician with a practice address in Aurora, Illinois, and NPI 1942458237, issued on Aug 29, 2008. Check the license (Illinois 036.121758, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William C. Park
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 036.121758 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1300 N Highland Ave Ste 1, Aurora, IL 60506
- Phone
- (630) 897-5104
- Enumerated
- Aug 29, 2008
- Record last updated
- Aug 12, 2024
- Fax
- (630) 897-5089
- Medicaid IDs
- 036121758 IL
362765923 IL - Medicare enrollment
- Enrolled (PECOS I20090205000231); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2008
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Also registered at 1300 N Highland Ave Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patrick Differding, MDOphthalmology Physician1356871016
- David Yoo, MDOphthalmology Physician1548343155
Verify William C. Park 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 036.121758Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average ophthalmology physician in 2024
649 Medicare Part D claims for 194 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Prednisolone Acetate160 claims
- Ofloxacin143 claims
- Ketorolac Tromethamine140 claims
- Latanoprost55 claims
- Lumigan30 claims
- Brimonidine Tartrate17 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: $544.83
20 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 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.
Bills Medicare through one group practice
- Aurora Eye Clinic LtdAurora, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William C. Park among 898 ophthalmology physician records in Illinois
William C. Park, 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 2008, is newer than 64% of them.
- NPI issued2008 · 64% of these records are older, 31% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2008 · median 1999 among the 551 with a school on file
- Record last updated2024 · 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 Aurora → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Robert Barnes, MDAurora, IL 605061609840503
- John Chu, MDAurora, IL 605061548285844
- Patrick Differding, MDAurora, IL 605061356871016
- Robert Foody, MDAurora, IL 605061780659912
- Tosca Kekish, MDAurora, IL 605061740214915
- Benjamin Mathew, MDAurora, IL 605061477781466
- Lois Polatnick, MDAurora, IL 605061154356434
- David Yoo, MDAurora, IL 605061548343155
Common questions
What is William C. Park, M.D.'s NPI number?
William C. Park, M.D.'s National Provider Identifier (NPI) is 1942458237, issued on Aug 29, 2008. An NPI identifies a provider in billing; it is not a license.
Where is William C. Park, M.D. located?
The NPPES record lists a practice address at 1300 N Highland Ave Ste 1, Aurora, IL, 60506. Phone: (630) 897-5104. Providers update this record themselves, so call before visiting.
How can I verify William C. Park, M.D.'s license?
NPPES lists Illinois license number 036.121758, 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 William C. Park, M.D. prescribe under Medicare Part D?
In 2024, William C. Park, M.D. had 649 Medicare Part D claims for 194 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.