Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Dennis D. Wilcox, M.D., Inc.

Q: What is the NPI number for Dennis D. Wilcox, M.D., Inc.?

The NPI for Dennis D. Wilcox, M.D., Inc. is 1538363312, a Type 2 (organization) record in the CMS NPPES registry.

Surgery Physician in Arcata, CA · enumerated 2007 · authorized official Barbara Wilcox, Office Manager.

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

National Provider Identifier

1538363312

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Registry record

Entity type Organization (Type 2)

Legal business name Dennis D. Wilcox, M.D., Inc.

Practice address 3800 Janes Rd, Arcata, CA, 95521

Phone (530) 241-1473

Fax (707) 825-4988

Enumeration date Jun 13, 2007

Last updated in NPPES Nov 10, 2020

Taxonomy & classification

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A44471 (CA) Primary

Authorized official

Name Barbara Wilcox

Title Office Manager

Phone (707) 822-2279

Other identifiers

Identifier	Type	State	Issuer
1538363312	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 Dennis D. Wilcox, M.D., Inc.?

The NPI for Dennis D. Wilcox, M.D., Inc. is 1538363312, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Dennis D. Wilcox, M.D., Inc.?

NPPES lists Barbara Wilcox (Office Manager) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-10.