Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Chih Jen Wang, O.D.

Optometrist in O Fallon, IL · enumerated 2006 · practices at Nu-Crown, LLC.

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

National Provider Identifier

1861443079

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Chih Jen Wang

Credential O.D.

Sex Male

Practice address 1560 W Us Highway 50, O Fallon, IL, 62269

Phone (618) 397-6575

Fax (800) 432-6004

Enumeration date May 12, 2006

Last updated in NPPES Feb 14, 2014

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 046-009615 (IL) Primary

152W00000X Optometrist Eye and Vision Services Providers · License 2004001752 (MO) Secondary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
046009615	Medicaid	IL	-
P00403017	Other	IL	RR MEDICARE

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 1861443079 active?

Yes, as of the latest NPPES snapshot, NPI 1861443079 is active (record last updated 2014-02-14).

How do I verify Chih Jen Wang's NPI record?

Cross-check NPI 1861443079 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

Browse all →

Nu-Crown, LLC Optometrist · O Fallon, IL NPI 1730232455

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-14.