Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Alwin E. Diaz
Psychologist in San Juan, PR · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1275807414
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Registry record
Entity type Individual (Type 1)
Name Dr. Alwin E. Diaz
Sex Male
Practice address Urb. Roosevelt, Calle Pedro Espada, 403, Suite 3, San Juan, PR, 00918
Phone (787) 294-6849
Enumeration date Mar 6, 2012
Last updated in NPPES Mar 6, 2012
Taxonomy & licenses
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 is the NPI number for Alwin Diaz?
The National Provider Identifier (NPI) for Alwin Diaz is 1275807414, a Type 1 (individual) record in the CMS NPPES registry.
Where does Alwin Diaz practice?
The practice location on file with NPPES is in San Juan, PR. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-06.