William Wen-Long Yang, MD
Ophthalmology · Springfield, IL
At a glance
2020 W Iles Ave, Springfield, IL 62704-7015
Published activity: Cataract surgery. View counts and coverage
NPPES record updated Feb 22, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
2020 W Iles AveSpringfield, IL 62704-7015
Additional reported practice locations
299 W Tietan StWalla Walla, WA 993624363
Phone: 5095252100
Fax: 5095220313
Education & affiliations
- Medical / professional school
- University Of Wisconsin School Of Medicine
- Graduation year
- 2004
- CMS specialties
- Ophthalmology
Practice groups
Reported hospital affiliations
- Providence St Mary Medical Center Walla Walla, WA
- St Johns Hospital Springfield, IL
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Cataract surgery | 88 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Services other than consulting | $5,445.00 |
| Food and beverage | $506.45 |
Reporting companies
| Company | Amount |
|---|---|
| VIFOR PHARMA, INC. | $5,504.15 |
| TARSUS PHARMACEUTICALS, INC. | $220.43 |
| BAUSCH & LOMB AMERICAS INC. | $97.16 |
| GLAUKOS CORPORATION | $40.07 |
| ASTELLAS PHARMA US INC | $31.48 |
| SUN PHARMACEUTICAL INDUSTRIES INC. | $24.60 |
| ALCON VISION LLC | $17.86 |
| ABBVIE INC. | $15.70 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Ophthalmology
- Taxonomy code
- 207W00000X
- Enumeration date
- Aug 29, 2007
- Record updated
- Feb 22, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207W00000X · Primary
License reported: 036126329 IL
207W00000X
License reported: 70002214 WA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
2020 W Iles AveSpringfield, IL 62704-7015
- Phone
- (217) 698-3030
- Fax
- (217) 698-4729
Mailing address
299 W TIETAN STWALLA WALLA, WA 993624363
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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