Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Hellen Yun, OD
Optometrist in Joliet, IL · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1841442159
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Registry record
Entity type Individual (Type 1)
Name Hellen Yun
Credential OD
Sex Female
Practice address 3340 Mall Loop Dr, Ste. 1442, Joliet, IL, 60431
Phone (815) 436-1582
Fax (815) 436-0497
Enumeration date Oct 17, 2008
Last updated in NPPES Oct 17, 2008
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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
Where does Hellen Yun practice?
The practice location on file with NPPES is in Joliet, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Hellen Yun?
The National Provider Identifier (NPI) for Hellen Yun is 1841442159, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Sabah Akbar Optometrist · Joliet, IL NPI 1144275082 Sabah Akbar Od Ltd Optometrist · Joliet, IL NPI 1801801758 Kevin Gralak Optometrist · Joliet, IL NPI 1174670426 Marlin Khouri Optometrist · Joliet, IL NPI 1891843652 Luxottica of America Inc. Eyewear Supplier · Joliet, IL NPI 1609920669 Visionworks Inc Eyewear Supplier · Joliet, IL NPI 1487844072 Michael Reda Hearing Instrument Specialist · Joliet, IL NPI 1417200189 Asma Sajjad Dentist · Joliet, IL NPI 1336580703
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-17.