Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Michael T Tierney DDS.Ltd

Clinic/Center in Oswego, IL · enumerated 2014 · authorized official Michael Tierney, Dentist.

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

National Provider Identifier

1043620131

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Michael T Tierney DDS.Ltd

Practice address 4781 State Route 71, Oswego, IL, 60543

Phone (630) 554-5157

Fax (630) 554-5487

Enumeration date Apr 29, 2014

Last updated in NPPES Apr 29, 2014

Taxonomy & classification

261Q00000X Clinic/Center Ambulatory Health Care Facilities · License 01914998 (IL) Primary

Authorized official

Name Michael Tierney

Title Dentist

Phone (630) 554-5157

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-04-29. Verify at npiregistry.cms.hhs.gov.

Where is Michael T Tierney DDS.Ltd located?

The practice location on file with NPPES is in Oswego, IL.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-29.