Quick answers
- Where does Stephan L. Cassidy see patients?
- Medicare's clinician data lists 1 practice location in Issaquah, WA. Call before your visit to confirm the address.
- What is Stephan L. Cassidy's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Stephan L. Cassidy accept Medicare assignment?
- Yes. Medicare's clinician data says Stephan L. Cassidy accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Stephan L. Cassidy?
- (425) 392-8756, as listed in official Medicare / NPI Registry data.
- What is Stephan L. Cassidy's NPI number?
- 1679630867. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Stephan L. Cassidy is enrolled with Medicare (CMS data updated 2026-10-02).
- 450 NW Gilman Blvd, Suite 104Issaquah, WA 98027 (425) 392‑8756
Group practices
Medicare enrollment lists Stephan L. Cassidy as a member of this group (CMS data updated 2026-10-02).
- Stephan Cassidy Od PS3 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Issaquah
Clinicians with the same Medicare primary specialty in Issaquah, WA — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Illinois College Of Optometry At Chicago |
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679630867 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians