Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ellen B. Callahan, D.M.D.

General Practice Dentistry in Oceanside, CA · enumerated 2005.

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

National Provider Identifier

1790778462

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Registry record

Entity type Individual (Type 1)

Name Dr. Ellen B. Callahan

Credential D.M.D.

Sex Female

Practice address 1st Dnbn, Ndc Camp Pendleton, Oceanside, CA, 92055

Phone (760) 725-2569

Enumeration date Aug 26, 2005

Last updated in NPPES Oct 14, 2014

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 53560 (CA) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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

What is the NPI number for Ellen Callahan?

The National Provider Identifier (NPI) for Ellen Callahan is 1790778462, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ellen Callahan practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-10-14.