Stephan L. Cassidy, O.D.
Optometrist · Issaquah, WA
Stephan L. Cassidy, O.D. is an optometrist with a practice address in Issaquah, Washington, and NPI 1679630867, issued on Jan 3, 2007. Check the license (Washington 3190, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephan L. Cassidy
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 3190 WA
Self-reported in NPPES; status is on the state search - Practice location
- 450 NW Gilman Blvd, Issaquah, WA 98027
- Phone
- (425) 392-8756
- Enumerated
- Jan 3, 2007
- Record last updated
- Dec 19, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (425) 391-8631
- Medicaid ID
- 2028686 WA
- Medicare enrollment
- Enrolled (PECOS I20070217000057); accepts Medicare assignment
- Medical or professional school
- Illinois College Of Optometry At Chicago, 1995
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,641 in Washington → Look up another NPI →
Also registered at 450 NW Gilman Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephan L. Cassidy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Washington board licenses this profession
Search for license 3190Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average optometrist in 2024
205 Medicare Part D claims for 72 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 45% of claims.
Most prescribed
- Latanoprost42 claims
- Travoprost22 claims
- Prednisolone Acetate20 claims
- Restasis20 claims
- Dorzolamide-Timolol16 claims
- Lumigan14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,321.64
20 payments; by number, the most common kind was food and beverage; the largest payer was Lumenis BE inc. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Stephan Cassidy OD PSIssaquah, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephan L. Cassidy among 1,641 optometrist records in Washington
Stephan L. Cassidy, O.D. is one of 1,641 optometrist records with a practice address in Washington. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 38% of them.
- NPI issued2007 · 38% of these records are older, 47% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1995 · median 2010 among the 949 with a school on file
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 optometrist records list a practice address in Issaquah
They are 26 of the 1,727 NPPES records with a practice address in Issaquah, and 1,641 optometrist records in Washington.
All 1,641 in Washington → Every provider in Issaquah → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Edwin AmboIssaquah, WA 980271336277102
- Eric Chang, O.D.Issaquah, WA 980271427207216
- Terry Cowgill, O.D.Issaquah, WA 980271285833087
- Mark Jensen, ODIssaquah, WA 980271760473920
- Yong Kwon, O.DIssaquah, WA 980271639422454
- Natalie Lam, O.D.Issaquah, WA 980271578705240
- Priya Macdonald, O.D.Issaquah, WA 980271245381375
- Mai Nguyen, O.D.Issaquah, WA 980271417269978
Common questions
What is Stephan L. Cassidy, O.D.'s NPI number?
Stephan L. Cassidy, O.D.'s National Provider Identifier (NPI) is 1679630867, issued on Jan 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Stephan L. Cassidy, O.D. located?
The NPPES record lists a practice address at 450 NW Gilman Blvd, Issaquah, WA, 98027. Phone: (425) 392-8756. Providers update this record themselves, so call before visiting.
How can I verify Stephan L. Cassidy, O.D.'s license?
NPPES lists Washington license number 3190, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.
How much does Stephan L. Cassidy, O.D. prescribe under Medicare Part D?
In 2024, Stephan L. Cassidy, O.D. had 205 Medicare Part D claims for 72 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.