Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Karlee Williams, LSW
Social Worker in Libertyville, IL · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164934113
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Registry record
Entity type Individual (Type 1)
Name Karlee Williams
Credential LSW
Sex Female
Practice address 1580 S Milwaukee Ave Ste 307, Libertyville, IL, 60048
Phone (847) 557-0645
Enumeration date Oct 31, 2017
Last updated in NPPES Oct 31, 2017
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 150.102588 (IL) 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.
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 Karlee Williams?
Karlee Williams 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.
Other providers at this practice address
Browse all → Drew Mjoen Professional Counselor · Libertyville, IL NPI 1306993522 Lucas Tillett Mental Health Counselor · Libertyville, IL NPI 1356860282 Andrea Freberg Professional Counselor · Libertyville, IL NPI 1477183838 Lauren Cavelli Professional Counselor · Libertyville, IL NPI 1194323022 Sarah Stumme Clinical Social Worker · Libertyville, IL NPI 1952900722 Martha Weil Counselor · Libertyville, IL NPI 1891410023
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-31.