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Dennis R. Long, M.D. Inc.

Legal Medicine in Orange, CA · enumerated 2006 · authorized official Sandi Williamson, Office Manager.

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

National Provider Identifier

1407954852

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Registry record

Entity type Organization (Type 2)
Legal business name Dennis R. Long, M.D. Inc.
Practice address 2601 E Chapman Ave, Orange, CA, 92869
Phone (951) 532-5005
Enumeration date Sep 20, 2006
Last updated in NPPES Apr 16, 2009

Taxonomy & classification

173000000X Legal Medicine Other Service Providers · License 00G472430 (CA) Primary

Authorized official

Name Sandi Williamson
Title Office Manager
Phone (951) 532-5005

Other identifiers

Identifier Type State Issuer
00G472430 Other CA BLUE CROSS/SHIELD
HG47243 Other CA TRICARE
00G472430 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.

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Frequently asked questions

What is the NPI number for Dennis R. Long, M.D. Inc.?
The NPI for Dennis R. Long, M.D. Inc. is 1407954852, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Dennis R. Long, M.D. Inc.?
NPPES lists Sandi Williamson (Office Manager) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-16.