Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Nestor Diaz, PHD
Psychologist in Humacao, PR · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649208158
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Registry record
Entity type Individual (Type 1)
Name Mr. Nestor Diaz
Credential PHD
Sex Male
Practice address Ave Tejas Carr 903 Km 5, Aps Clinics of Puerto Rico Inc Humaeao, Humacao, PR, 00791
Phone (787) 641-0774
Fax (787) 641-2759
Enumeration date Jun 30, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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 Nestor Diaz?
Nestor Diaz is registered in NPPES with the primary taxonomy of Psychologist. 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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.