Stephan L. Cassidy, OD
- Medicare patients, 2024
- 243
- Part D claims, 2024
- 205
- Industry payments
- $203
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 450 Nw Gilman Blvd Ste 303, Issaquah, WA 98027
- Practice phone
- Call (425) 391-8666
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Issaquah Foot & Ankle Specialists
Surgery Center - Medicare-Certified · Issaquah, Washington
Find Stephan Cassidy's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Stephan L. Cassidy is an optometrist in Issaquah, Washington
Stephan Cassidy practices at Issaquah Foot & Ankle Specialists in Issaquah, Washington.
Stephan Cassidy's NPI, 1679630867, was assigned on January 3, 2007. Stephan Cassidy graduated from Illinois College of Optometry at Chicago in 1995. Stephan Cassidy holds Washington license 3190.
- NPI
- 1679630867NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284736554
- NPI enumeration date
- January 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (425) 391-8666
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Stephan L. Cassidy practices at Issaquah Foot & Ankle Specialists in Issaquah, Washington
Stephan Cassidy's primary practice is Issaquah Foot & Ankle Specialists, at 450 Nw Gilman Blvd Ste 303, Issaquah, WA 98027. The practice phone is (425) 391-8666.
- Issaquah Foot & Ankle Specialists450 Nw Gilman Blvd Ste 303, Issaquah, WA 98027Phone(425) 391-8666
Source: Dmand AI Affiliation Data
Stephan L. Cassidy is affiliated with 2 sites of care and 1 medical group
Stephan Cassidy's primary practice is Issaquah Foot & Ankle Specialists in Issaquah, Washington. Dmand AI also links Stephan Cassidy to 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Stephan L. Cassidy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Stephan Cassidy practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Issaquah Foot & Ankle Specialists | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Stephan L. Cassidy is one of 1,258 optometrists in Washington
Optometrist is Stephan Cassidy's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Stephan Cassidy is licensed in Washington.
Specialties and state licenses
- Optometrist, WashingtonPrimary
Optometrists near Stephan Cassidy
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Stephan L. Cassidy treated 243 Medicare patients in 2024, average age 74
CMS counts 243 Medicare patients who saw Stephan Cassidy in 2024. The largest group is 65 to 74, with 117 patients. 70% of them have high cholesterol, and 55% have high blood pressure. 5% are also on Medicaid. Their average risk score is 0.87, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Stephan Cassidy's median patient age at 69, with 60% women.
Stephan Cassidy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Stephan Cassidy's Medicare patients by sex, 2024
- Women14258%
- Men10142%
Chronic conditions among Stephan Cassidy's Medicare patients, 2024
- High cholesterol70%
- High blood pressure55%
- Arthritis38%
- Osteoporosis21%
- Diabetes17%
- Ischemic heart disease17%
- Cancer14%
- Mood disorders14%
Share of Medicare patients with each condition. A patient can have several.
Stephan Cassidy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Stephan L. Cassidy wrote 205 Medicare Part D claims in 2024
In 2024, Stephan Cassidy wrote 205 Medicare Part D claims for 72 patients. 55% of them were for generic drugs.
Stephan Cassidy's Part D claims by kind of drug, 2024
- Generic112 claims55%
- Brand-name93 claims45%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Stephan L. Cassidy ranks in the 51st percentile for cataract surgery in Medicare
Stephan Cassidy accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 27 procedures of cataract surgery by Stephan Cassidy, more than 51% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Stephan Cassidy ranks in Medicare procedure volume
- Cataract surgery
- 51st percentile27 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Stephan L. Cassidy received $203 in industry payments in 2025
CMS Open Payments shows 8 general payments to Stephan Cassidy from 5 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Bausch & Lomb Americas Inc. paid the most, $64.
Companies that paid Stephan Cassidy the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Stephan L. Cassidy graduated from Illinois College of Optometry at Chicago
Stephan Cassidy graduated from Illinois College of Optometry at Chicago in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Stephan L. Cassidy's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Stephan L. Cassidy
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Stephan L. Cassidy's NPI number?
Stephan L. Cassidy's NPI number is 1679630867. It was assigned on January 3, 2007, and it is active in the NPI Registry.
What does Stephan L. Cassidy specialize in?
Stephan L. Cassidy is an optometrist in Issaquah, Washington. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Stephan L. Cassidy practice?
Stephan Cassidy practices at 450 Nw Gilman Blvd Ste 303, Issaquah, WA 98027. Stephan Cassidy's primary practice is Issaquah Foot & Ankle Specialists in Issaquah, Washington. Dmand AI also links Stephan Cassidy to 1 group practice or clinic and 1 medical group.
What is Stephan L. Cassidy's office phone number?
The practice phone on file for Stephan Cassidy is (425) 391-8666.
What is Stephan L. Cassidy's medical license number?
Stephan Cassidy holds Washington license 3190.
Does Stephan L. Cassidy accept Medicare?
Yes. CMS lists Stephan Cassidy as accepting Medicare assignment.
How many Medicare patients does Stephan L. Cassidy see?
CMS counts 243 Medicare patients who saw Stephan Cassidy in 2024, with an average age of 74.
Where did Stephan L. Cassidy go to medical school?
Stephan Cassidy graduated from Illinois College of Optometry at Chicago in 1995.
Has Stephan L. Cassidy received payments from drug or device companies?
CMS Open Payments shows $203 in general payments to Stephan Cassidy from 5 companies from 2025 to 2025. The largest total came from Bausch & Lomb Americas Inc.
How long has Stephan L. Cassidy been practicing?
Stephan Cassidy graduated from medical school in 1995, 31 years ago.
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