Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Serena Diaz
Social Worker in Addison, IL · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1326836248
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Registry record
Entity type Individual (Type 1)
Name Serena Diaz
Sex Female
Practice address 228 S Yale Ave, Addison, IL, 60101
Phone (224) 261-4533
Enumeration date Apr 29, 2025
Last updated in NPPES Apr 29, 2025
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License 150114107 (IL) Primary
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 Serena Diaz?
Serena Diaz 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 2025-04-29.