Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Kathleen Collins Seibert, MA/LCSW

Clinical Social Worker in Belleville, IL · enumerated 2012.

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

National Provider Identifier

1821348228

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Registry record

Entity type Individual (Type 1)

Name Kathleen Collins Seibert

Credential MA/LCSW

Sex Female

Practice address 4500 Memorial Dr, Memorial Senior Care - Memorial Hospital, Belleville, IL, 62226

Phone (618) 257-5986

Enumeration date Sep 12, 2012

Last updated in NPPES Jan 11, 2013

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 005643 (MO) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 149.006231 (IL) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Kathleen Seibert?

The National Provider Identifier (NPI) for Kathleen Seibert is 1821348228, a Type 1 (individual) record in the CMS NPPES registry.

Where does Kathleen Seibert practice?

The practice location on file with NPPES is in Belleville, IL. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-11.