NPI Portal NPI Lookup & Verification

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

Dr. William Dunn, O.D.

Optometrist in Springfield, OR · enumerated 2006.

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

National Provider Identifier

1285691048

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Registry record

Entity type Individual (Type 1)
Name Dr. William Dunn
Credential O.D.
Sex Male
Practice address Springfield, OR, 97478
Phone (541) 726-6822
Fax (541) 726-7768
Enumeration date Apr 27, 2006
Last updated in NPPES May 28, 2009

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 1310ATI (OR) Primary
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
048769 Medicaid OR -
R145460 Other OR MEDICARE PTAN

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

What is the NPI number for William Dunn?
The National Provider Identifier (NPI) for William Dunn is 1285691048, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Dunn practice?
The practice location on file with NPPES is in Springfield, OR. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-28.