Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Thomas Kaczynski
Dentist in Johnsburg, IL · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790117299
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Registry record
Entity type Individual (Type 1)
Name Thomas Kaczynski
Sex Male
Practice address 2964 Commerce Dr, Johnsburg, IL, 60051
Phone (815) 363-0103
Enumeration date Aug 6, 2013
Last updated in NPPES Aug 6, 2013
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
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 Thomas Kaczynski?
Thomas Kaczynski 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.
Other providers at this practice address
Browse all → Chiro One Wellness Center of Mchenry LLC Chiropractor · Johnsburg, IL NPI 1487892410 The Mchenry Dentist Dentist · Johnsburg, IL NPI 1912240177 Julie Haddix General Practice Dentistry · Mchenry, IL NPI 1427610856 Kathy Nguyen Dentist · Johnsburg, IL NPI 1184218927 Estelle Milrud Dentist · Johnsburg, IL NPI 1811564917 Navneet Kaur Dentist · Mchenry, IL NPI 1518530336 Gunhee Song General Practice Dentistry · Mchenry, IL NPI 1417688391 Harsimar Nijjar General Practice Dentistry · Johnsburg, IL NPI 1578256012
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-08-06.