Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cynthia B. Bjorseth, O.D.

Optometrist in Naperville, IL · enumerated 2006.

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

National Provider Identifier

1003874421

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Registry record

Entity type Individual (Type 1)

Name Dr. Cynthia B. Bjorseth

Credential O.D.

Sex Female

Practice address 3027 English Row Ave Ste 209, Naperville, IL, 60564

Phone (630) 922-2661

Fax (630) 470-6979

Enumeration date May 3, 2006

Last updated in NPPES Nov 8, 2017

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 046008917 (IL) Primary

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

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 1003874421 active?

Yes, as of the latest NPPES snapshot, NPI 1003874421 is active (record last updated 2017-11-08).

How do I verify Cynthia Bjorseth's NPI record?

Cross-check NPI 1003874421 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-08.