Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Gretchen Renee Aguilar, ARNP, FNP-C

Nurse Practitioner in Tonasket, WA · enumerated 2024 · practices at Okanogan County Public Hospital Dist No 4.

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

National Provider Identifier

1578391249

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Registry record

Entity type Individual (Type 1)

Name Gretchen Renee Aguilar

Credential ARNP, FNP-C

Sex Female

Practice address Tonasket, WA, 98855

Phone (509) 486-3191

Fax (509) 223-1743

Enumeration date Jul 24, 2024

Last updated in NPPES Dec 4, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LS0200X School Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP61589138 (WA) Secondary

363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP61589138 (WA) Secondary

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP61589138 (WA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP61589138 (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

Where does Gretchen Aguilar practice?

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

What is the NPI number for Gretchen Aguilar?

The National Provider Identifier (NPI) for Gretchen Aguilar is 1578391249, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-04.