Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Cornelia Seiffert, Lcsw, A Licensed Clinical Social Worker Corporation

Clinical Social Worker in Orange, CA · enumerated 2022 · authorized official Cornelia Seiffert, Lcsw/Owner.

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

National Provider Identifier

1164161105

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Registry record

Entity type Organization (Type 2)

Legal business name Cornelia Seiffert, Lcsw, A Licensed Clinical Social Worker Corporation

Practice address 1820 W Orangewood Ave Ste 105, Orange, CA, 92868

Phone (323) 886-2417

Enumeration date May 28, 2022

Last updated in NPPES Jun 2, 2022

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

Authorized official

Name Cornelia Seiffert

Title Lcsw/Owner

Phone (323) 886-2417

Other identifiers

Identifier	Type	State	Issuer
225NQ40K	Medicaid	CA	-

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

Who is the authorized official for Cornelia Seiffert, Lcsw, A Licensed Clinical Social Worker Corporation?

NPPES lists Cornelia Seiffert (Lcsw/Owner) as the authorized official for this organization.

What is the NPI number for Cornelia Seiffert, Lcsw, A Licensed Clinical Social Worker Corporation?

The NPI for Cornelia Seiffert, Lcsw, A Licensed Clinical Social Worker Corporation is 1164161105, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-06-02.