Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Connie L Onik, D. M. D.

General Practice Dentistry in Naperville, IL · enumerated 2010.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1720319445

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Registry record

Entity type Individual (Type 1)

Name Connie L Onik

Credential D. M. D.

Sex Female

Practice address 720 Brom Ct Ste 105, Naperville, IL, 60540

Phone (630) 420-2800

Fax (630) 355-3306

Enumeration date Jan 20, 2010

Last updated in NPPES May 18, 2021

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 019-026170 (IL) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1720319445 active?

Yes, as of the latest NPPES snapshot, NPI 1720319445 is active (record last updated 2021-05-18).

How do I verify Connie Onik's NPI record?

Cross-check NPI 1720319445 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Christopher Krizek General Practice Dentistry · Naperville, IL NPI 1366650046

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-05-18.