Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Cassandra Williams, M.S.W.
Social Worker in Saint Louis, MO · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1205234804
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Registry record
Entity type Individual (Type 1)
Name Cassandra Williams
Credential M.S.W.
Sex Female
Practice address 4236 Lindell Blvd, Suite 200, Saint Louis, MO, 63108
Phone (314) 531-1155
Enumeration date Dec 12, 2014
Last updated in NPPES Dec 12, 2014
Taxonomy & licenses
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
What is the NPI number for Cassandra Williams?
The National Provider Identifier (NPI) for Cassandra Williams is 1205234804, a Type 1 (individual) record in the CMS NPPES registry.
Where does Cassandra Williams practice?
The practice location on file with NPPES is in Saint Louis, MO. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Valerie Dixon Marriage & Family Therapist · Saint Louis, MO NPI 1790991404 Julia Peters Social Worker · Saint Louis, MO NPI 1922304187 Gayle Heady Clinical Social Worker · Saint Louis, MO NPI 1538597414 Penny Smith Social Worker · Saint Louis, MO NPI 1932521077 Gregory Peebles Mental Health Counselor · Saint Louis, MO NPI 1821411067 Mykael Ornbaun Clinical Social Worker · Saint Louis, MO NPI 1073910667 Alix Weitman Clinical Social Worker · Saint Louis, MO NPI 1770968299 Khin Min Thu Social Worker · St Louis, MO NPI 1003338492
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-12-12.