Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. George Dunn Kastner, LCSW
Clinical Social Worker in Tampa, FL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1255434817
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Registry record
Entity type Individual (Type 1)
Name Mr. George Dunn Kastner
Credential LCSW
Sex Male
Practice address 3500 E Fletcher Ave, S-129, Tampa, FL, 33613
Phone (813) 978-3960
Fax (813) 978-3960
Enumeration date Sep 7, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License FLSW3457 (FL) 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.
Frequently asked questions
Is NPI 1255434817 active?
Yes, as of the latest NPPES snapshot, NPI 1255434817 is active (record last updated 2007-07-08).
How do I verify George Kastner's NPI record?
Cross-check NPI 1255434817 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.