William Wen-Long Yang, MD
Ophthalmology Physician · Springfield, IL
William Wen-Long Yang, MD is an ophthalmology physician with a practice address in Springfield, Illinois, and NPI 1790979011, issued on Aug 29, 2007. Check the license (Illinois 036126329, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William Wen-Long Yang
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- 036126329 IL
70002214 WA
Self-reported in NPPES; status is on the state search - Practice location
- 2020 W Iles Ave, Springfield, IL 62704
- Phone
- (217) 698-3030
- Enumerated
- Aug 29, 2007
- Record last updated
- Feb 22, 2026
- Fax
- (217) 698-4729
- Medicare enrollment
- Enrolled (PECOS I20110126000598); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 898 in Illinois → Look up another NPI →
Also registered at 2020 W Iles Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily Beyer, ODOptometrist1063862266
- Robert Blumthal, O.D.Optometrist1578568077
- Stephen Cook, MDSpecialist1043268386
- Kenneth Farr, MDOphthalmology Physician1740366244
- Stuart Farris, MDOphthalmology Physician1144279498
- Sean Hendricks, M.D.Retina Specialist (Ophthalmology) Physician1164583084
Verify William Wen-Long Yang 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 036126329Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average ophthalmology physician in 2024
1,667 Medicare Part D claims for 397 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 49% of claims.
Most prescribed
- Prednisolone Acetate500 claims
- Ketorolac Tromethamine348 claims
- Ofloxacin346 claims
- Cyclosporine75 claims
- Restasis70 claims
- Xiidra50 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 practice group's MIPS final score for 2023 (Medicare payment program): 77.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,386.22
16 payments; by number, the most common kind was food and beverage; the largest payer was Vifor Pharma, 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 2 group practices
- Andrew S Edwards MD PLLCWalla Walla, WA
- Prairie Eye Center, LtdSpringfield, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Wen-Long Yang among 898 ophthalmology physician records in Illinois
William Wen-Long Yang, MD 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 updated2026 · 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 Springfield → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Kenneth Farr, MDSpringfield, IL 627041740366244
- Stuart Farris, MDSpringfield, IL 627041144279498
- Thandeka Myeni, M.D.Springfield, IL 627041972764801
- Frederick Rauscher, MDSpringfield, IL 627041316147564
- Alex Willis, MDSpringfield, IL 627041316442288
- Sandra Yeh, MDSpringfield, IL 627041841248838
- Ramanath Bhandari, MDSpringfield, IL 627031255594248
- Phyllis Eze, M.DSpringfield, IL 627031609063106
Common questions
What is William Wen-Long Yang, MD's NPI number?
William Wen-Long Yang, MD's National Provider Identifier (NPI) is 1790979011, issued on Aug 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Wen-Long Yang, MD located?
The NPPES record lists a practice address at 2020 W Iles Ave, Springfield, IL, 62704. Phone: (217) 698-3030. Providers update this record themselves, so call before visiting.
How can I verify William Wen-Long Yang, MD's license?
NPPES lists Illinois license number 036126329, 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 Wen-Long Yang, MD prescribe under Medicare Part D?
In 2024, William Wen-Long Yang, MD had 1,667 Medicare Part D claims for 397 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is William Wen-Long Yang, MD's MIPS final score?
The 2023 MIPS final score is 77.7 of 100, reported for the practice group. 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.