Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas M. Mareing, D.DS

General Practice Dentistry in Oak Lawn, IL · enumerated 2008 · practices at Oak Lawn Dental Group, P.C..

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

National Provider Identifier

1528219250

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas M. Mareing

Credential D.DS

Sex Male

Practice address 10220 S. Cicero Ave, Suite 101-103, Oak Lawn, IL, 60453

Phone (708) 499-2266

Fax (708) 499-2292

Enumeration date Sep 30, 2008

Last updated in NPPES Feb 3, 2009

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 19A15286 (IL) 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 Thomas Mareing's NPI record?

Cross-check NPI 1528219250 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1528219250 active?

Yes, as of the latest NPPES snapshot, NPI 1528219250 is active (record last updated 2009-02-03).

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Gerald Connors General Practice Dentistry · Oak Lawn, IL NPI 1194822668 Oak Lawn Dental Group, P.C. General Practice Dentistry · Oak Lawn, IL NPI 1972796654

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-03.