Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Natalie C Diaz
Behavior Analyst in Cicero, IL · enumerated 2011.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1851668164
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Registry record
Entity type Individual (Type 1)
Name Natalie C Diaz
Sex Female
Practice address 3100 S Central Ave, Cicero, IL, 60804
Phone (708) 863-3803
Enumeration date Nov 30, 2011
Last updated in NPPES Jun 6, 2017
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 specialty is Natalie Diaz?
Natalie 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.
Other providers at this practice address
Browse all → Seguin Services Intellectual and/or Developmental Disabilities Community Based Residential Treatment Facility · Cicero, IL NPI 1023267358 Ucp Seguin of Greater Chicago Mental Health Clinic/Center (Including Community Mental Health Center) · Cicero, IL NPI 1649404716 Dana Pavlik Behavior Analyst · Cicero, IL NPI 1487910998 Donna Ressler Robinson Behavior Analyst · Cicero, IL NPI 1053740597 Jesus Sanchez Behavior Analyst · Cicero, IL NPI 1538580469 Aisha Joyner Behavior Analyst · Cicero, IL NPI 1548798796 Alessandra Villela Behavior Analyst · Cicero, IL NPI 1326577164 Emisa Bell Behavior Analyst · Cicero, IL NPI 1003315284
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-06-06.