Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Olatundun Oladayo Williams, MD

Individual provider Pediatric Hematology & Oncology Physician · NPI 1598082174

Olatundun Oladayo Williams, MD is a Pediatric Hematology & Oncology Physician in Seattle, Washington. Works from 2 locations. Licensed in Illinois, New York and Washington.

Licensed in
IL, NY, WA
In the registry since
2010
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

825 Eastlake Ave E
Seattle, WA 98109-4405
Phone: (206) 520-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3959 Broadway, New York, NY 10032-1559 — (212) 305-5437

Specialties & licences

Pediatric Hematology & Oncology Physician (primary) Taxonomy 2080P0207X · Licence MD61622255 (WA)
Pediatric Hematology & Oncology Physician Taxonomy 2080P0207X · Licence 036.133875 (IL)
Pediatric Hematology & Oncology Physician Taxonomy 2080P0207X · Licence 314573 (NY)

Record details

NPI number1598082174
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 22, 2010
Last updated in NPPESJanuary 29, 2025
Certification dateJanuary 29, 2025

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