DR. RYAN CASSADAY M.D.
NPI 1508060583
Internal Medicine - Hematology & Oncology in Seattle, WA
About Dr. Ryan Cassaday M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RYAN CASSADAY M.D. (NPI 1508060583) is an individual hematology & oncology provider in Seattle, Washington, licensed in Washington (MD60158445) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with University Of Washington Medical Ctr, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Ryan Cassaday M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Ryan Cassaday reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Seattle, WA 98104
- Reassigned Medicare billing, Washington enrollment
- 4,364 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Washington Medical Ctr
Acute Care Hospitals · Seattle, WAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 98109 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SEATTLE, WA 98109
SEATTLE, WA 98109
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Ryan Cassaday's NPI number?
The NPI number for Ryan Cassaday is 1508060583. It was assigned to this individual provider in the NPPES registry on June 13, 2007.
Where is Ryan Cassaday located?
Ryan Cassaday practices at 825 Eastlake Ave E, Seattle, WA 98109. The listed phone number is (206) 288-1000.
What is Ryan Cassaday's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Ryan Cassaday enrolled in Medicare?
Yes. Ryan Cassaday is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Ryan Cassaday's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryan Cassaday reassigns Medicare benefits to The Association Of University Physicians (Seattle, WA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ryan Cassaday's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ryan Cassaday accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Ryan Cassaday as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ryan Cassaday affiliated with any hospitals?
According to CMS data, Ryan Cassaday is affiliated with University Of Washington Medical Ctr.
When was this NPI record last updated?
The NPPES record for Ryan Cassaday was last updated on January 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Ryan Cassaday, M.D. · NPI 1508060583
Hematology & Oncology physician in Seattle, Washington. Individual provider, active in the CMS NPPES registry since June 13, 2007.
## Identity
- **NPI:** 1508060583 (Entity type: Individual)
- **Enumerated:** June 13, 2007
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** MD60158445 (Washington)
- **Sole proprietor:** No
## Practice location
- **Address:** 825 EASTLAKE AVE E, Seattle, WA 98109-4405
- **Phone:** (206) 288-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** The Association Of University Physicians (NPI 1023041159, Seattle, WA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** January 24, 2014
- **Other identifiers:** Medicaid 1508060583 (WA); Medicare PIN 8924331 (WA)
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Source: [NPI Profile](https://npiprofile.com/npi/1508060583) · Data from the CMS NPPES public registry.