Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

William J Holmes, M.D., Inc

Q: What type of organization is William J Holmes, M.D., Inc?

William J Holmes, M.D., Inc is registered in NPPES as a Specialist (its primary provider taxonomy).

Specialist in Modesto, CA · enumerated 2007 · authorized official William Holmes, President.

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

National Provider Identifier

1144418070

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Registry record

Entity type Organization (Type 2)

Legal business name William J Holmes, M.D., Inc

Practice address 1335 Coffee Rd Ste 100, Modesto, CA, 95355

Phone (209) 524-5977

Fax (209) 524-7395

Enumeration date Oct 4, 2007

Last updated in NPPES Mar 11, 2013

Taxonomy & classification

174400000X Specialist Other Service Providers · License G81678 (CA) Primary

Authorized official

Name William Holmes

Title President

Phone (209) 524-5977

Other identifiers

Identifier	Type	State	Issuer
00G816780	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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is William J Holmes, M.D., Inc?

William J Holmes, M.D., Inc is registered in NPPES as a Specialist (its primary provider taxonomy).

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-11.