Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Leslie Castillo, AU.D.
Audiologist in Glen Ellyn, IL · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821976184
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Leslie Castillo
Credential AU.D.
Sex Female
Practice address 430 Pennsylvania Ave Ste 330, Glen Ellyn, IL, 60137
Phone (630) 545-7650
Fax (630) 718-2655
Enumeration date Aug 25, 2025
Last updated in NPPES Oct 6, 2025
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License 147.012213 (IL) Primary
AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders.
About the AUD credential
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
How do I verify Leslie Castillo's NPI record?
Cross-check NPI 1821976184 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1821976184 active?
Yes, as of the latest NPPES snapshot, NPI 1821976184 is active (record last updated 2025-10-06).
Other providers at this practice address
Browse all → Kevin Hulett Otolaryngology Physician · Glen Ellyn, IL NPI 1952341257 Kelly Bramlette Physician Assistant · Glen Ellyn, IL NPI 1497910814 Laura Weese Audiologist · Glen Ellyn, IL NPI 1326274069 Heather Koopmann Audiologist · Glen Ellyn, IL NPI 1013596485 Kayla Gettemy Audiologist · Glen Ellyn, IL NPI 1205711504
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-06.