Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sydney Katherine Johnstone, PA-C

Physician Assistant in Corvallis, OR · enumerated 2010 · practices at Good Samaritan Hospital Corvallis.

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

National Provider Identifier

1447576541

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Registry record

Entity type Individual (Type 1)

Name Sydney Katherine Johnstone

Credential PA-C

Sex Female

Practice address 3620 Nw Samaritan Dr Ste 201, Corvallis, OR, 97330

Phone (541) 768-6300

Fax (541) 768-6301

Enumeration date Apr 14, 2010

Last updated in NPPES May 5, 2016

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA60120252 (WA) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA155839 (OR) Primary

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 1447576541 active?

Yes, as of the latest NPPES snapshot, NPI 1447576541 is active (record last updated 2016-05-05).

How do I verify Sydney Johnstone's NPI record?

Cross-check NPI 1447576541 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-05.