Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Siobhan Williams, LLMSW

Clinical Social Worker in Benton Harbor, MI · enumerated 2017.

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

National Provider Identifier

1003327628

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Siobhan Williams

Credential LLMSW

Sex Female

Practice address 1613 M 139, Benton Harbor, MI, 49022

Phone (269) 925-0585

Enumeration date Oct 23, 2017

Last updated in NPPES Oct 23, 2017

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 6801101721 (MI) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Siobhan Williams's NPI record?

Cross-check NPI 1003327628 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003327628 active?

Yes, as of the latest NPPES snapshot, NPI 1003327628 is active (record last updated 2017-10-23).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-23.