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Dr. Matthew James Grierson, MD

Sports Medicine (Physical Medicine & Rehabilitation) Physician in Seattle, WA · enumerated 2009.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053549618

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Registry record

Entity type Individual (Type 1)
Name Dr. Matthew James Grierson
Credential MD
Sex Male
Practice address 3213 Eastlake Avenue East, Suite A, Seattle, WA, 98102
Phone (206) 861-8200
Fax (206) 324-1178
Enumeration date Jun 22, 2009
Last updated in NPPES Feb 28, 2023

Taxonomy & licenses

2081S0010X Sports Medicine (Physical Medicine & Rehabilitation) Physician Allopathic & Osteopathic Physicians · License MD60234865 (WA) Primary
208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License MD60234865 (WA) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Matthew Grierson?
The National Provider Identifier (NPI) for Matthew Grierson is 1053549618, a Type 1 (individual) record in the CMS NPPES registry.
Where does Matthew Grierson practice?
The practice location on file with NPPES is in Seattle, WA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-28.