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Mary E Brennan, ARNP

Occupational Health Nurse Practitioner in Longview, WA · enumerated 2005 · practices at Peacehealth.

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

National Provider Identifier

1861485872

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Registry record

Entity type Individual (Type 1)
Name Mary E Brennan
Credential ARNP
Sex Female
Practice address 1405 Delaware St, Longview, WA, 98632
Phone (360) 414-2332
Fax (360) 414-2330
Enumeration date Aug 24, 2005
Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN00061070 (WA) Secondary
163WX0106X Occupational Health Registered Nurse Nursing Service Providers · License RN00061070 (WA) Secondary
363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP30001951 (WA) Secondary
363LX0106X Occupational Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP30001951 (WA) Primary

Other identifiers

Identifier Type State Issuer
100229 Medicaid OR -
166678 Other WA LABOR & IND.
8933453 Other WA CRIME VICTIMS
9636150 Medicaid WA -

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

What specialty is Mary Brennan?
Mary Brennan is registered in NPPES with the primary taxonomy of Occupational 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 2025-09-11.