Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

D. Maddox, M.D., A Prof. Corp

Q: What type of organization is D. Maddox, M.D., A Prof. Corp?

D. Maddox, M.D., A Prof. Corp is registered in NPPES as a Specialist (its primary provider taxonomy).

Specialist in Bakersfield, CA · enumerated 2007 · authorized official Denis Maddox, President.

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

National Provider Identifier

1174716997

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Registry record

Entity type Organization (Type 2)

Legal business name D. Maddox, M.D., A Prof. Corp

Practice address 2901 Sillect Ave Ste 200, Bakersfield, CA, 93308

Phone (661) 326-1100

Enumeration date Aug 24, 2007

Last updated in NPPES Apr 20, 2009

Taxonomy & classification

174400000X Specialist Other Service Providers · License G24697 (CA) Primary

Authorized official

Name Denis Maddox

Title President

Phone (661) 326-1100

Other identifiers

Identifier	Type	State	Issuer
DN8120	Other	CA	GROUP RAILROAD
ZZZ05742Z	Other	CA	MEDICARE PTAN
00G246970	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 type of organization is D. Maddox, M.D., A Prof. Corp?

D. Maddox, M.D., A Prof. Corp is registered in NPPES as a Specialist (its primary provider taxonomy).

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-20.