Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Wen Y Chen, MD

Ophthalmology Physician in East Alton, IL · enumerated 2006 · practices at Chen Wen Y.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1255351961

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Registry record

Entity type Individual (Type 1)

Name Wen Y Chen

Credential MD

Sex Male

Practice address East Alton, IL, 62024

Phone (618) 259-0440

Fax (618) 258-4362

Enumeration date Jul 19, 2006

Last updated in NPPES Nov 29, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 036-079700 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1224820001	Other	IL	MEDICARE DME PTAN
1932378668	Other	IL	DME NPI
036079700	Medicaid	IL	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1255351961 active?

Yes, as of the latest NPPES snapshot, NPI 1255351961 is active (record last updated 2012-11-29).

How do I verify Wen Chen's NPI record?

Cross-check NPI 1255351961 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Chen Wen Y Eyewear Supplier · East Alton, IL NPI 1932378668

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-29.