Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Blair Ellis Jr.

Professional Counselor in Yakima, WA · enumerated 2018.

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

National Provider Identifier

1720558711

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Registry record

Entity type Individual (Type 1)

Name William Blair Ellis Jr.

Sex Male

Practice address 611 W A St, Yakima, WA, 98902

Phone (509) 452-1000

Fax (509) 452-1004

Enumeration date Dec 3, 2018

Last updated in NPPES Dec 3, 2018

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License CP00002864 (WA) Secondary

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License CL60157386 (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 William Ellis practice?

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

What is the NPI number for William Ellis?

The National Provider Identifier (NPI) for William Ellis is 1720558711, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Tanner Rapp Psychiatric/Mental Health Nurse Practitioner · Yakima, WA NPI 1144992314 Albert Bass Addiction (Substance Use Disorder) Counselor · Yakima, WA NPI 1922863307 Brittney Mccray Addiction (Substance Use Disorder) Counselor · Yakima, WA NPI 1215773999

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-03.