Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rhiannon A Armstrong, ARNP

Psychiatric/Mental Health Nurse Practitioner in Spokane, WA · enumerated 2019.

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

National Provider Identifier

1366090110

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Registry record

Entity type Individual (Type 1)

Name Rhiannon A Armstrong

Credential ARNP

Sex Female

Practice address 316 W Boone Ave Ste 656, Spokane, WA, 99201

Phone (509) 872-5009

Fax (509) 593-4676

Enumeration date Aug 26, 2019

Last updated in NPPES Aug 1, 2025

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN60426571 (WA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP61004461 (WA) 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

What specialty is Rhiannon Armstrong?

Rhiannon Armstrong is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Nurse Practitioner. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-01.