Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dennis B Hartlieb, DDS

General Practice Dentistry in Glenview, IL · enumerated 2006.

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

National Provider Identifier

1881756682

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Registry record

Entity type Individual (Type 1)

Name Dr. Dennis B Hartlieb

Credential DDS

Sex Male

Practice address 2601 Compass Rd, Suite 100, Glenview, IL, 60026

Phone (847) 729-6080

Fax (847) 729-7809

Enumeration date Dec 15, 2006

Last updated in NPPES Mar 24, 2010

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 19A21551 (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 Dennis Hartlieb's NPI record?

Cross-check NPI 1881756682 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1881756682 active?

Yes, as of the latest NPPES snapshot, NPI 1881756682 is active (record last updated 2010-03-24).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-24.