Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew J. Finnegan, MD

Surgery Physician in Northfield, NJ · enumerated 2006.

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

National Provider Identifier

1003845223

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Registry record

Entity type Individual (Type 1)

Name Matthew J. Finnegan

Credential MD

Sex Male

Practice address 1418 New Rd Ste 2, Northfield, NJ, 08225

Phone (609) 796-7969

Enumeration date Jul 1, 2006

Last updated in NPPES Oct 23, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 25MA05349300 (NJ) Primary

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

Is NPI 1003845223 active?

Yes, as of the latest NPPES snapshot, NPI 1003845223 is active (record last updated 2025-10-23).

How do I verify Matthew Finnegan's NPI record?

Cross-check NPI 1003845223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Gary Oxenberg Internal Medicine Physician · Northfield, NJ NPI 1346214533 Jenna Mcnicholl Medical Physician Assistant · Northfield, NJ NPI 1861798399 Diane Maggio Gerontology Nurse Practitioner · Northfield, NJ NPI 1063753473 Garden State Specialty Care, LLC Internal Medicine Physician · Northfield, NJ NPI 1851825947 Garden State Specialty Care, LLC Surgery Physician · Northfield, NJ NPI 1356107916

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-23.