Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Derek Duane Isetti, PHD
Social Worker in Calabasas, CA · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477344398
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Registry record
Entity type Individual (Type 1)
Name Dr. Derek Duane Isetti
Credential PHD
Sex Male
Practice address 4774 Park Granada Unit 8742, Calabasas, CA, 91302
Phone (310) 853-2489
Enumeration date May 13, 2025
Last updated in NPPES Apr 29, 2026
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License ASW133952 (CA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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
What specialty is Derek Isetti?
Derek Isetti is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-29.