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MARSHALL SCOTT HORWITZ
NPI 1013007970
Medical Genetics - Clinical Genetics (M.D.) in Seattle, WA

Active since October 13, 2006PECOS EnrolledAccepts Medicare Assignment
93.09/100
CMS Quality Rating
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST, SEATTLE, WA 98195(206) 616-2135 Get Directions Write a Review

NPPES record last updated: January 14, 2019. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Marshall Scott Horwitz NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARSHALL SCOTT HORWITZ (NPI 1013007970) is an individual clinical genetics (m.d.) provider in Seattle, Washington, licensed in Washington (MD00030116) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Washington School Of Medicine (1990).

NPPES Registry Identity

NPI1013007970
Entity TypeIndividualMale
Primary Taxonomy207SG0201X
Provider Legal NameMARSHALL SCOTT HORWITZ
Location AddressUNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC STSeattle, WA 98195-6127
Mailing AddressPo Box 50095Seattle, WA 98145-5095 · (206) 543-6420
Phone(206) 616-2135
Sole ProprietorNo
Medical School CMSUniversity Of Washington School Of MedicineGraduated 1990
Enumeration DateOctober 13, 2006
Last NPPES UpdateJanuary 14, 2019
✔ NPI 1013007970 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyMedical Genetics · Clinical Genetics (M.D.)Allopathic & Osteopathic Physicians
Taxonomy Code207SG0201X
License✔ Licensed in WA · MD00030116
Definition
A clinical geneticist demonstrates competence in providing comprehensive diagnostic, management and counseling services for genetic disorders.
Also ListedInternal MedicineTaxonomy 207R00000X · License MD00030116 (WA)
Also ListedMedical Genetics · Clinical Molecular GeneticsTaxonomy 207SG0203X · License MD00030116 (WA)
Also ListedMedical Genetics · Molecular Genetic PathologyTaxonomy 207SM0001X · License MD00030116 (WA)
UNIVERSITY OF WASHINGTON MEDICAL CTR, Seattle, WA 98195
Open in Google Maps ↗

Other Identifiers 2

Other8789Internal Id-motor Vehicle Id
Medicaid1013007970WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marshall Scott Horwitz is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4587791207
PECOS Enrollment IDI20100428000514
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

93.09/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality73.95
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BRENDA M SANDMAIER
Internal Medicine (Hematology & Oncology)
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 288-1000
PATRICK C FREENY
Radiology (Diagnostic Radiology)
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 598-6214
GEORGE A OJEMANN
Neurological Surgery
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 598-5637
CAROL M BUCHTER
Internal Medicine (Cardiovascular Disease)
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 598-4300
CORINNE LINA FLIGNER
Pathology (Anatomic Pathology & Clinical Pathology)
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 598-6400
EDUS HOUSTON WARREN III
Internal Medicine (Hematology & Oncology)
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 288-1000
GREGORY DEMBO
Anesthesiology
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 543-8606
FREDERICK A MATSEN III
Orthopaedic Surgery
UNIVERSITY OF WASHINGTON MEDICAL CTR, 1959 NE PACIFIC ST
SEATTLE, WA 98195
King County (206) 543-3690

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marshall Horwitz's NPI number?

The NPI number for Marshall Horwitz is 1013007970. It was assigned to this individual provider in the NPPES registry on October 13, 2006.

Where is Marshall Horwitz located?

Marshall Horwitz practices at University Of Washington Medical Ctr 1959 NE Pacific St, Seattle, WA 98195. The listed phone number is (206) 616-2135.

What is Marshall Horwitz's specialty?

The primary specialty registered for this NPI is Medical Genetics, specializing in Clinical Genetics (M.D.), with taxonomy code 207SG0201X.

Is Marshall Horwitz enrolled in Medicare?

Yes. Marshall Horwitz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Marshall Horwitz accept?

Health plans from PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Marshall Horwitz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Marshall Horwitz was last updated on January 14, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.