Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Eric Tseng, O.D,
Optometrist in Chicago, IL · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1629233580
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Registry record
Entity type Individual (Type 1)
Name Dr. Eric Tseng
Credential O.D,
Sex Male
Practice address 9928 S Western Ave, Chicago, IL, 60643
Phone (773) 303-8279
Fax (773) 681-7119
Enumeration date Jul 21, 2008
Last updated in NPPES Apr 23, 2026
Taxonomy & licenses
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 |
|---|---|---|---|
| 046010071 | Medicaid | IL | - |
| IL2815001 | Other | IL | PTAN |
| 1629233580 | 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.
Frequently asked questions
How do I verify Eric Tseng's NPI record?
Cross-check NPI 1629233580 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1629233580 active?
Yes, as of the latest NPPES snapshot, NPI 1629233580 is active (record last updated 2026-04-23).
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-23.