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

SIERRA WILLIAMS
NPI 1518808385
Counselor in Seattle, WA

Active since April 03, 2026
2100 24TH AVE S, SEATTLE, WA 98144(206) 382-5340 Get Directions Write a Review

NPPES record last updated: August 24, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Aug 24, 2026, Apr 3, 2026 (2 updates tracked since 2026).

About Sierra Williams NPPES

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

SIERRA WILLIAMS (NPI 1518808385) is an individual counselor in Seattle, Washington and active in the NPI registry since April 2026.

NPPES Registry Identity

NPI1518808385
Entity TypeIndividualFemale
Primary Taxonomy101Y00000X
Provider Legal NameSIERRA WILLIAMS
Location Address2100 24TH AVE SSeattle, WA 98144-4637
Mailing Address2100 24th Ave SSeattle, WA 98144-4637
Phone(206) 382-5340
Sole ProprietorNo
Enumeration DateApril 3, 2026
Last NPPES UpdateAugust 24, 20262 updates tracked since enumeration
NPPES CertifiedAugust 24, 2026
✔ NPI 1518808385 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselorBehavioral Health & Social Service Providers
Taxonomy Code101Y00000X
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.
2100 24TH AVE S, Seattle, WA 98144
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Other Providers at the Same Location NPPES 20

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

LAQUONIA D COOPER
Counselor
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 382-5340
OLIVER KENNEDY KLINE
Peer Specialist
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 382-5340
JENNIE JEPSEN
Counselor
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 382-5340
LOVELL SYKES
Community Health Worker
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 382-5340
KATIE SHERPE
Counselor
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 382-5340
LOU SCHWAB
Counselor
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 556-5791
RAVINA BANUMATI GOBURDHUN
Case Manager/Care Coordinator
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 610-9708
MACKENZIE PUTMAN
Counselor
2100 24TH AVE S
SEATTLE, WA 98144
King County (206) 382-5340

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 Sierra Williams's NPI number?

The NPI number for Sierra Williams is 1518808385. It was assigned to this individual provider in the NPPES registry on April 3, 2026.

Where is Sierra Williams located?

Sierra Williams practices at 2100 24th Ave S, Seattle, WA 98144. The listed phone number is (206) 382-5340.

What is Sierra Williams'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 Sierra Williams was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.