Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Matthew Lonergan, MD

Hematology & Oncology Physician in Eugene, OR · enumerated 2006 · practices at Oncology Associates of Oregon P C.

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

National Provider Identifier

1639122591

Verified

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Registry record

Entity type Individual (Type 1)

Name Matthew Lonergan

Credential MD

Sex Male

Practice address 520 Country Club, Eugene, OR, 97401

Phone (541) 683-5001

Fax (541) 683-1422

Enumeration date May 19, 2006

Last updated in NPPES Jul 15, 2021

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD00034123 (WA) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD00034123 (WA) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD171696 (OR) Primary

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
1639122591	Medicaid	WA	-
900004086	Other	WA	RAILROAD MEDICARE
0291409	Other	WA	L&I

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 Matthew Lonergan 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 Matthew Lonergan?

The National Provider Identifier (NPI) for Matthew Lonergan is 1639122591, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Keith Goldstein Medical Oncology Physician · Eugene, OR NPI 1861462566 Oncology Associates of Oregon P C Hematology & Oncology Physician · Eugene, OR NPI 1013989854 John Fitzharris Medical Oncology Physician · Eugene, OR NPI 1356447288 Benjamin Cho Medical Oncology Physician · Eugene, OR NPI 1245360759 Thomas Sroka Radiation Oncology Physician · Eugene, OR NPI 1700058021 Marc Uemura Internal Medicine Physician · Eugene, OR NPI 1487971081 Sagen Olson Medical Physician Assistant · Eugene, OR NPI 1376884304 Choolwe Mupunga Nurse Practitioner · Eugene, OR NPI 1770942708

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-15.