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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MR. WILLIAM DERRELL HILL MA LMHCA
NPI 1851803886
Counselor in Seattle, WA

Active since October 31, 2017
6407 SHAFFER AVE S, SEATTLE, WA 98108(206) 602-4073 Get Directions Write a Review

NPPES record last updated: July 22, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 22, 2026, May 11, 2021, Jan 4, 2021 and 1 more (4 updates tracked since 2017).

About Mr. William Derrell Hill Ma Lmhca NPPES

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

MR. WILLIAM DERRELL HILL MA LMHCA (NPI 1851803886) is an individual counselor in Seattle, Washington, licensed in Washington (MC60720633) and active in the NPI registry since October 2017. He maintains 2 additional practice locations.

NPPES Registry Identity

NPI1851803886
Entity TypeIndividualMale
Primary Taxonomy101Y00000X
Provider Legal NameMR. WILLIAM DERRELL HILLCredential: MA LMHCA
Location Address6407 SHAFFER AVE SSeattle, WA 98108-3745
Mailing AddressPo Box 1121Roseburg, OR 97470-0254 · (541) 672-2691 · Fax (541) 440-3554
Phone(206) 602-4073
Sole ProprietorYes
Enumeration DateOctober 31, 2017
Last NPPES UpdateJuly 22, 20264 updates tracked since enumeration
NPPES CertifiedJuly 22, 2026
✔ NPI 1851803886 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCounselorBehavioral Health & Social Service Providers
Taxonomy Code101Y00000X
License✔ Licensed in WA · MC60720633
Definition
A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X
6407 SHAFFER AVE S, Seattle, WA 98108
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Secondary Practice Locations 2

Location 12210 N Eldorado AveKlamath Falls, OR 97601-6418 · Phone (541) 883-1030
Location 2548 SE Jackson StRoseburg, OR 97470-4983 · Phone (877) 408-8941 · Fax (541) 813-2536

Other Providers at the Same Location NPPES

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

TOAN VINH DANG
Massage Therapist
6407 SHAFFER AVE S
SEATTLE, WA 98108
King County (206) 747-8847

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 Hill's NPI number?

The NPI number for William Hill is 1851803886. It was assigned to this individual provider in the NPPES registry on October 31, 2017.

Where is William Hill located?

William Hill practices at 6407 Shaffer Ave S, Seattle, WA 98108. The listed phone number is (206) 602-4073.

What is William Hill's specialty?

The primary specialty registered for this NPI is Counselor with taxonomy code 101Y00000X.

When was this NPI record last updated?

The NPPES record for William Hill was last updated on July 22, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.