Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Christopher O'Brien, DO

Surgery Physician in Janesville, WI · enumerated 2020.

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

National Provider Identifier

1417577024

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Registry record

Entity type Individual (Type 1)

Name Matthew Christopher O'Brien

Credential DO

Sex Male

Practice address 3200 E Racine St, Janesville, WI, 53546

Phone (608) 371-8000

Fax (608) 373-8713

Enumeration date Apr 23, 2020

Last updated in NPPES Oct 8, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 81821 (WI) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Matthew O'Brien?

The National Provider Identifier (NPI) for Matthew O'Brien is 1417577024, a Type 1 (individual) record in the CMS NPPES registry.

Where does Matthew O'Brien practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-08.