Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jon James Gruchalski, DDS

General Practice Dentistry in New Berlin, WI · enumerated 2008.

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

National Provider Identifier

1083873004

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Registry record

Entity type Individual (Type 1)

Name Dr. Jon James Gruchalski

Credential DDS

Sex Male

Practice address 4010 South Church Drive, New Berlin, WI, 53151

Phone (262) 784-2449

Fax (262) 784-7873

Enumeration date Jun 5, 2008

Last updated in NPPES Jun 5, 2008

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 3978 (WI) Primary

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.

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Frequently asked questions

How do I verify Jon Gruchalski's NPI record?

Cross-check NPI 1083873004 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1083873004 active?

Yes, as of the latest NPPES snapshot, NPI 1083873004 is active (record last updated 2008-06-05).

Other providers at this practice address

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Jeffrey Gruchalski General Practice Dentistry · New Berlin, WI NPI 1366603995

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-05.