Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary M Austin-Seymour, M.D.

Radiation Oncology Physician in Corvallis, OR · enumerated 2006 · practices at Radiation Oncology Associates, PC.

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

National Provider Identifier

1194816843

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Registry record

Entity type Individual (Type 1)

Name Mary M Austin-Seymour

Credential M.D.

Sex Female

Practice address 501 Nw Elks Dr, Corvallis, OR, 97330

Phone (541) 768-5220

Enumeration date Sep 27, 2006

Last updated in NPPES Jul 31, 2009

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD27023 (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
247363	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mary Austin-Seymour practice?

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

What is the NPI number for Mary Austin-Seymour?

The National Provider Identifier (NPI) for Mary Austin-Seymour is 1194816843, 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 2009-07-31.