Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ann-Marie Yost, MD

Neurological Surgery Physician in Portland, OR · enumerated 2007.

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

National Provider Identifier

1730217704

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Registry record

Entity type Individual (Type 1)

Name Ann-Marie Yost

Credential MD

Sex Female

Practice address 9155 Sw Barnes Rd, Suite 440, Portland, OR, 97225

Phone (503) 935-8500

Fax (503) 935-8505

Enumeration date Mar 1, 2007

Last updated in NPPES Nov 22, 2023

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License MD00036204 (WA) Secondary

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License MD153921 (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
1730217704	Medicaid	WA	-
500614092	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

What specialty is Ann-Marie Yost?

Ann-Marie Yost is registered in NPPES with the primary taxonomy of Neurological Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-22.