Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Carl Frenzel
Dentist in Lombard, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1497823009
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Registry record
Entity type Individual (Type 1)
Name Dr. John Carl Frenzel
Sex Male
Practice address 2 E 22nd St, Lombard, IL, 60148
Phone (630) 627-4680
Enumeration date Dec 1, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 13812 | Other | IL | BCBS |
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 John Frenzel practice?
The practice location on file with NPPES is in Lombard, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Frenzel?
The National Provider Identifier (NPI) for John Frenzel is 1497823009, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Gartrell King Family Medicine Physician · Lombard, IL NPI 1962449140 Meredith Keller Dental Hygienist · Lombard, IL NPI 1851469357 Sandra Lucas Dental Hygienist · Lombard, IL NPI 1124187133 Susan Avalos Dental Hygienist · Lombard, IL NPI 1790845246 Adultchildrencenterltd Professional Counselor · Lombard, IL NPI 1063638401 Carrie Naydenoff Dental Hygienist · Lombard, IL NPI 1700079720 Nancy Stamas Professional Counselor · Lombard, IL NPI 1033308879 Lorri Fisher Clinical Social Worker · Lombard, IL NPI 1184893455
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.