Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Tatiana Diaz

Behavior Analyst in Willowbrook, IL · enumerated 2019.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1801456926

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Registry record

Entity type Individual (Type 1)

Name Tatiana Diaz

Sex Female

Practice address 6300 Kingery Hwy Ste 102, Willowbrook, IL, 60527

Phone (815) 469-1500

Enumeration date Jun 20, 2019

Last updated in NPPES Nov 20, 2025

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-20-46201 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.

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Frequently asked questions

What specialty is Tatiana Diaz?

Tatiana Diaz is registered in NPPES with the primary taxonomy of Behavior Analyst. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-20.