Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Sagen Castellanos Olson, PA-C

Medical Physician Assistant in Eugene, OR · enumerated 2013 · practices at Oncology Associates of Oregon P C.

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

National Provider Identifier

1376884304

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Registry record

Entity type Individual (Type 1)

Name Sagen Castellanos Olson

Credential PA-C

Sex Female

Practice address Eugene, OR, 97401

Phone (541) 683-5001

Fax (541) 683-1422

Enumeration date Mar 15, 2013

Last updated in NPPES Sep 28, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 169708 (OR) Primary

Other identifiers

Identifier	Type	State	Issuer
500616351	Medicaid	OR	-

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

How do I verify Sagen Olson's NPI record?

Cross-check NPI 1376884304 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1376884304 active?

Yes, as of the latest NPPES snapshot, NPI 1376884304 is active (record last updated 2021-09-28).

Other providers at this practice address

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Keith Goldstein Medical Oncology Physician · Eugene, OR NPI 1861462566 Oncology Associates of Oregon P C Hematology & Oncology Physician · Eugene, OR NPI 1013989854 Matthew Lonergan Hematology & Oncology Physician · Eugene, OR NPI 1639122591 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 Choolwe Mupunga Nurse Practitioner · Eugene, OR NPI 1770942708

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-28.