Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Leena Yousef-Diaz, APN
Nurse Practitioner in Dyer, IN · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1407338858
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Leena Yousef-Diaz
Credential APN
Sex Female
Practice address 1100 Joliet Street Suite #201, Dyer, IN, 46311
Phone (219) 200-4676
Enumeration date Sep 2, 2018
Last updated in NPPES Sep 2, 2018
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209017754 (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 is the NPI number for Leena Yousef-Diaz?
The National Provider Identifier (NPI) for Leena Yousef-Diaz is 1407338858, a Type 1 (individual) record in the CMS NPPES registry.
Where does Leena Yousef-Diaz practice?
The practice location on file with NPPES is in Dyer, IN. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-02.