Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Diane Jeanette Dudderar, DDS

General Practice Dentistry in Middletown, DE · enumerated 2006.

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

National Provider Identifier

1902993777

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Registry record

Entity type Individual (Type 1)

Name Dr. Diane Jeanette Dudderar

Credential DDS

Sex Female

Practice address 600 N Broad St, Middletown, DE, 19709

Phone (302) 376-7882

Enumeration date Oct 5, 2006

Last updated in NPPES Jun 24, 2010

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License GI0000963 (DE) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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 Diane Dudderar practice?

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

What is the NPI number for Diane Dudderar?

The National Provider Identifier (NPI) for Diane Dudderar is 1902993777, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-24.