Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM SCOTT KOENIG APRN
NPI 1548194640
Nurse Practitioner - Psychiatric/Mental Health in Ethel, WA

Q: What is William Koenig's NPI number?

The NPI number for William Koenig is 1548194640. It was assigned to this individual provider in the NPPES registry on June 11, 2026.

Q: What is William Koenig's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Q: When was this NPI record last updated?

The NPPES record for William Koenig was last updated on August 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 11, 2026

187A TUCKER RD, ETHEL, WA 98542(360) 827-5362 Get Directions Write a Review

NPPES record last updated: August 16, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

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About William Scott Koenig Aprn NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM SCOTT KOENIG APRN (NPI 1548194640) is an individual psychiatric/mental health provider in Ethel, Washington, licensed in Washington (ARNP.AP.70141126-NP) and active in the NPI registry since June 2026.

NPPES Registry Identity

NPI1548194640

Entity TypeIndividual

Primary Taxonomy363LP0808X

Provider Legal NameWILLIAM SCOTT KOENIGCredential: APRN

Location Address187A TUCKER RDEthel, WA 98542-9704

Mailing AddressPo Box 753Toledo, WA 98591-0753 · (360) 978-5925

Phone(360) 827-5362

Sole ProprietorYes

Enumeration DateJune 11, 2026

Last NPPES UpdateAugust 16, 2026

NPPES CertifiedAugust 16, 2026

✔ NPI 1548194640 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LP0808X

License✔ Licensed in WA · ARNP.AP.70141126-NP

187A TUCKER RD, Ethel, WA 98542

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Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WILL KOENIG, PMHNP PLLC

Nurse Practitioner (Psychiatric/Mental Health)

187A TUCKER RD
ETHEL, WA 98542

Lewis County (360) 827-5362

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Koenig's NPI number?

The NPI number for William Koenig is 1548194640. It was assigned to this individual provider in the NPPES registry on June 11, 2026.

Where is William Koenig located?

William Koenig practices at 187A Tucker Rd, Ethel, WA 98542. The listed phone number is (360) 827-5362.

What is William Koenig's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

When was this NPI record last updated?

The NPPES record for William Koenig was last updated on August 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.