Internal Medicine, Hematology & Oncology
Dr. RYAN CASSADAY M.D.
Identity confirmed via CMS NPPES · September 30, 2026 · A directory match is not a coverage approval.
Is this your practice? This listing was imported from public provider identity data (CMS NPPES) and has not yet been claimed. Claim this listing to confirm the practice details. Plan acceptance stays unpublished until the practice reports it.
Public record
NPI 1508060583 · enumerated 2007-06-13 · record updated 2014-01-24. Source: CMS NPPES. A listing is not a TRICARE network approval.
NPPES recordGoogle Maps Apple Maps OpenStreetMap
Addresses and phones
- Mailing address PO BOX 50095, SEATTLE, WA, 98145-5095 (206) 543-6420 Google Maps Apple Maps OpenStreetMap
- Practice location 825 EASTLAKE AVE E, SEATTLE, WA, 98109-4405 (206) 288-1000 Google Maps Apple Maps OpenStreetMap
Specialties
- Internal Medicine 207R00000X · License MD60158445 WA
- Internal Medicine, Hematology & Oncology 207RH0003X · Primary · License MD60158445 WA
In this directory
WA King County Seattle Internal Medicine, Hematology & Oncology
Locations and evidence
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Practice location
SEATTLE, WA, 981094405
Accepting new patientsNot reportedCMS NPPES · September 30, 2026
Plan acceptance
- No published plan acceptance yet. Confirm directly with the practice, or claim this listing if it's yours.