Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patricia M Callahan, MD

Pediatrics Physician in Eugene, OR · enumerated 2005.

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

National Provider Identifier

1023010543

Verified

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Registry record

Entity type Individual (Type 1)

Name Patricia M Callahan

Credential MD

Sex Female

Practice address 2830 Crescent Ave, Eugene, OR, 97408

Phone (541) 686-9000

Enumeration date Aug 15, 2005

Last updated in NPPES Sep 19, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD221841 (OR) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 4301081153 (MI) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 52382 (WI) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
4657480	Medicaid	MI	-
4514404	Medicaid	MI	-

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

Where does Patricia Callahan practice?

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

What is the NPI number for Patricia Callahan?

The National Provider Identifier (NPI) for Patricia Callahan is 1023010543, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-19.