Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Joseph Tegtmeier, LCSW

Clinical Social Worker in Wilmington, DE · enumerated 2007 · practices at State of De.

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

National Provider Identifier

1427268739

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Registry record

Entity type Individual (Type 1)

Name Mr. Joseph Tegtmeier

Credential LCSW

Sex Male

Practice address 809 N Washington St, Wilmington, DE, 19801

Phone (302) 577-6490

Fax (302) 577-6498

Enumeration date May 23, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License Q1-0000876 (DE) 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

Is NPI 1427268739 active?

Yes, as of the latest NPPES snapshot, NPI 1427268739 is active (record last updated 2007-07-08).

How do I verify Joseph Tegtmeier's NPI record?

Cross-check NPI 1427268739 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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State of De Mental Health Clinic/Center (Including Community Mental Health Center) · Wilmington, DE NPI 1609895762 Sandra Korines Clinical Social Worker · Wilmington, DE NPI 1174057632

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.