Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Rebecca Williams, MSW

Clinical Social Worker in Silverdale, WA · enumerated 2015 · practices at Mcs Counseling Group LLC.

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

National Provider Identifier

1447625728

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Registry record

Entity type Individual (Type 1)

Name Ms. Rebecca Williams

Credential MSW

Sex Female

Practice address 3888 Nw Randall Way Ste 201, Silverdale, WA, 98383

Phone (360) 698-5883

Fax (360) 809-6002

Enumeration date Dec 11, 2015

Last updated in NPPES Nov 29, 2024

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LW61213863 (WA) Primary

Other identifiers

Identifier	Type	State	Issuer
2228875	Medicaid	WA	-

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

What specialty is Rebecca Williams?

Rebecca Williams is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Sarah Doemland Mental Health Counselor · Silverdale, WA NPI 1205139961 Julie Canterbury Mental Health Counselor · Silverdale, WA NPI 1982035176 Matthew Poinsett Mental Health Counselor · Silverdale, WA NPI 1811365497 John Thigpen Clinical Social Worker · Silverdale, WA NPI 1093250698 Mcs Counseling Group LLC Mental Health Counselor · Silverdale, WA NPI 1740727494 Josephine Nickum Mental Health Counselor · Silverdale, WA NPI 1598280661 Taylor West Marriage & Family Therapist · Silverdale, WA NPI 1821501685 Amie Greist Mental Health Counselor · Silverdale, WA NPI 1417462615

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-29.