Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

W. Clinton Mcduffie, MD

Family Medicine Physician in San Rafael, CA · enumerated 2006.

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

National Provider Identifier

1801960414

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Registry record

Entity type Individual (Type 1)

Name W. Clinton Mcduffie

Credential MD

Sex Male

Practice address 99 Montecillo Rd, San Rafael, CA, 94903

Phone (415) 444-2000

Enumeration date Nov 17, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A40077 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00A400770	Medicaid	CA	-

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 W. Clinton Mcduffie?

The National Provider Identifier (NPI) for W. Clinton Mcduffie is 1801960414, a Type 1 (individual) record in the CMS NPPES registry.

Where does W. Clinton Mcduffie practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.