Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Stephan L Cassidy, O.D.
Optometrist in Issaquah, WA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1679630867
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Registry record
Entity type Individual (Type 1)
Name Dr. Stephan L Cassidy
Credential O.D.
Sex Male
Practice address 450 Nw Gilman Blvd, Ste 104, Issaquah, WA, 98027
Phone (425) 392-8756
Fax (425) 391-8631
Enumeration date Jan 3, 2007
Last updated in NPPES Dec 19, 2007
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 |
|---|---|---|---|
| 2028686 | Medicaid | WA | - |
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
Where does Stephan Cassidy practice?
The practice location on file with NPPES is in Issaquah, WA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Stephan Cassidy?
The National Provider Identifier (NPI) for Stephan Cassidy is 1679630867, a Type 1 (individual) record in the CMS NPPES registry.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-19.