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

Ray Mun Koo

Individual provider Internal Medicine Physician · NPI 1942166327

Ray Mun Koo is a Hematology/Oncology in Seattle, Washington. Qualified in 2012, 14 years ago. Practices with The Association of University Physicians, a 3,459-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
14
Licensed in
WA
In the registry since
2025
Specialties on file
2
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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.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence TR70062707 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence TR70062707 (WA)

Record details

NPI number1942166327
Entity typeIndividual (Type 1)
GenderNot disclosed
Sole proprietorNo
NPI enumeratedDecember 30, 2025
Last updated in NPPESDecember 30, 2025
Certification dateDecember 30, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice The Association Of University Physicians — 3459 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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