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Frank Trieste Grassi

Critical Care Medicine (Internal Medicine) Physician in San Diego, CA · enumerated 2006.

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

National Provider Identifier

1659342624

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Registry record

Entity type Individual (Type 1)
Name Frank Trieste Grassi
Sex Male
Practice address 7901 Frost St, San Diego, CA, 92123
Phone (858) 939-3411
Enumeration date Jan 30, 2006
Last updated in NPPES Mar 30, 2026

Taxonomy & licenses

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License C52598 (CA) 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 is the NPI number for Frank Grassi?
The National Provider Identifier (NPI) for Frank Grassi is 1659342624, a Type 1 (individual) record in the CMS NPPES registry.
Where does Frank Grassi practice?
The practice location on file with NPPES is in San Diego, CA. 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 2026-03-30.