Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. James Clifford Marshall, DO

Internal Medicine Physician in Largo, FL · enumerated 2006.

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

National Provider Identifier

1609979228

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Registry record

Entity type Individual (Type 1)

Name Dr. James Clifford Marshall

Credential DO

Sex Male

Practice address 13121 Cimarron Cir N, Largo, FL, 33774

Phone (727) 776-1446

Enumeration date Sep 7, 2006

Last updated in NPPES Jun 16, 2026

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 73941 (WI) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License OS6394 (FL) Primary

DO — Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
371465900	Medicaid	FL	—

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for James Marshall?

The National Provider Identifier (NPI) for James Marshall is 1609979228, a Type 1 (individual) record in the CMS NPPES registry.

Where does James Marshall practice?

The practice location on file with NPPES is in Largo, FL. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-16.