Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Justyna Chojnowski, DDS
Dentist in Gurnee, IL · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1245808005
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Registry record
Entity type Individual (Type 1)
Name Justyna Chojnowski
Credential DDS
Sex Female
Practice address 101 S Greenleaf St Ste E, Gurnee, IL, 60031
Phone (847) 662-3100
Enumeration date Jun 16, 2021
Last updated in NPPES Jul 27, 2021
Taxonomy & licenses
DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees.
About the DDS 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
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.
What specialty is Justyna Chojnowski?
Justyna Chojnowski is registered in NPPES with the primary taxonomy of Dentist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-27.