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

Sara J Grethlein, MD

Individual provider Medical Oncology Physician · NPI 1326083445

Sara J Grethlein, MD is a Hematology/Oncology in Seattle, Washington. Qualified in 1988, 38 years ago. Practices with Peacehealth, a 69-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
38
Licensed in
WA
In the registry since
2006
Specialties on file
2
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

1221 Madison St 2nd Fl
Seattle, WA 98104-3588
Phone: (206) 386-2323
Fax: (206) 215-6165
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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 MD61107310 (WA)
Medical Oncology Physician Taxonomy 207RX0202X · Licence MD61107310 (WA)

Record details

NPI number1326083445
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 20, 2006
Last updated in NPPESNovember 9, 2021
Certification dateNovember 9, 2021

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice Peacehealth — 69 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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