Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William M Griffin, M.D.

Specialist in Jackson, CA · enumerated 2007.

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

National Provider Identifier

1417095183

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Registry record

Entity type Individual (Type 1)

Name Dr. William M Griffin

Credential M.D.

Sex Male

Practice address 200 Mission Blvd, Jackson, CA, 95642

Phone (209) 223-0949

Fax (209) 223-0965

Enumeration date Feb 2, 2007

Last updated in NPPES Dec 18, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G65062 (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
GROO43480	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

Where does William Griffin practice?

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

What is the NPI number for William Griffin?

The National Provider Identifier (NPI) for William Griffin is 1417095183, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-18.