Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Skyler Kirk, LCSW
Social Worker in Belle Fourche, SD · enumerated 2023.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790462893
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Registry record
Entity type Individual (Type 1)
Name William Skyler Kirk
Credential LCSW
Sex Male
Practice address 836 5th Ave # 249, Belle Fourche, SD, 57717
Phone (970) 703-3260
Enumeration date Jun 29, 2023
Last updated in NPPES Jul 2, 2026
Taxonomy & licenses
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License TPSW6901 (FL) Secondary
104100000X Social Worker Behavioral Health & Social Service Providers · License CSW.09932683 (CO) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy.
About the LCSW credential
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.
Frequently asked questions
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.
What specialty is William Kirk?
William Kirk is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-02.