NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mark Grimmett, PA-C

Medical Physician Assistant in Tempe, AZ · enumerated 2005.

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

National Provider Identifier

1184605842

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Registry record

Entity type Individual (Type 1)
Name Mark Grimmett
Credential PA-C
Sex Male
Practice address Tempe, AZ, 85284
Phone (480) 664-9443
Fax (480) 664-9378
Enumeration date Nov 9, 2005
Last updated in NPPES Mar 20, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7209350001 (AZ) Secondary
332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7047150001 (AZ) Secondary
332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7045160001 (AZ) Secondary
332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7046960001 (AZ) Secondary
332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7629170001 (AZ) Secondary
332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7034950001 (AZ) Secondary
332B00000X Durable Medical Equipment & Medical Supplies Suppliers · License 7057360001 (AZ) Secondary
363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 6657 (AZ) Primary

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 specialty is Mark Grimmett?
Mark Grimmett is registered in NPPES with the primary taxonomy of Medical Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-20.