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

David Mason Siebert

Individual provider Sports Medicine (Family Medicine) Physician · NPI 1174866354

David Mason Siebert is a Family Practice in Seattle, Washington. Graduated from University of Chicago, Pritzker School of Medicine in 2013, 13 years ago. Practices with The Association of University Physicians, a 3,459-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
13
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
WA
In the registry since
2013
Specialties on file
2
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Practice location Address checks out

3800 Montlake Blvd NE
Seattle, WA 98195-8021
Phone: (206) 598-3294
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 314 Ne Thornton Pl, Seattle, WA 98125-9000 — (206) 528-8000

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD60584255 (WA)
Sports Medicine (Family Medicine) Physician Taxonomy 207QS0010X · Licence MD60584255 (WA)

Record details

NPI number1174866354
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedApril 5, 2013
Last updated in NPPESAugust 7, 2020
Certification dateAugust 7, 2020
Mailing address3800 Montlake Blvd Ne, Seattle, WA 98195

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice The Association Of University Physicians — 3459 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Seattle