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

Dr. Susan Lee Masonis, MD

Individual provider Internal Medicine Physician · NPI 1124244207

Dr. Susan Lee Masonis, MD is a Hospitalist in Seattle, Washington. Graduated from Jefferson Medical College of Thomas Jefferson University in 2001, 25 years ago. Practices with Kaiser Foundation Health Plan of Washington, a 1,519-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
25
Trained at
Jefferson Medical College of Thomas Jefferson University
Licensed in
WA
In the registry since
2007
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

747 Broadway
Seattle, WA 98122-4379
Phone: (206) 386-2202
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 925 Seneca St, Seattle, WA 98101-2742 — (206) 341-0736

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD00044807 (WA)

Record details

NPI number1124244207
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 18, 2007
Last updated in NPPESApril 27, 2021
Certification dateApril 27, 2021

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolJEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduated 2001 (25 years in practice)
Group practice Kaiser Foundation Health Plan Of Washington — 1519 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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