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

Marshall Scott Horwitz

Individual provider Internal Medicine Physician · NPI 1013007970

Marshall Scott Horwitz is a Medical Genetics and Genomics in Seattle, Washington. Graduated from University of Washington School of Medicine in 1990, 36 years ago. Practices with The Association of University Physicians, a 3,459-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
36
Trained at
University of Washington School of Medicine
Licensed in
WA
In the registry since
2006
Specialties on file
4
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Practice location Partly verified

Some contact details are missing from the federal record.

University Of Washington Medical Ctr 1959 NE Pacific St
Seattle, WA 98195-6127
Phone: (206) 616-2135
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Genetics (M.D.) Physician (primary) Taxonomy 207SG0201X · Licence MD00030116 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD00030116 (WA)
Clinical Molecular Genetics Physician Taxonomy 207SG0203X · Licence MD00030116 (WA)
Molecular Genetic Pathology (Medical Genetics) Physician Taxonomy 207SM0001X · Licence MD00030116 (WA)

Record details

NPI number1013007970
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedOctober 13, 2006
Last updated in NPPESJanuary 14, 2019

Medicare enrollment

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

Medicare specialtyMEDICAL GENETICS AND GENOMICS
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 1990 (36 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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