Dr John D Mcmahon Ltd

Dr John D Mcmahon Ltd is a healthcare organization registered as General Practice Dentistry in Niles, IL, holding Type 2 (organization) NPI 1659560464 since 2007. The authorized official on file is John Mcmahon, President.

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NPI	1659560464
Entity type	Organization (Type 2)
Legal business name	Dr John D Mcmahon Ltd
Practice address	8100 OAKTON ST, Niles, IL, 60714
Phone	8478235142
Fax	8476924462
Enumeration date	2007-10-17
Last updated in NPPES	2008-01-16

Authorized official

Name	John Mcmahon
Title	President
Phone	8478235142

Taxonomy & classification

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	01911351	IL

Copy-ready billing details

Provider: Dr John D Mcmahon Ltd
NPI: 1659560464
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: 8100 OAKTON ST, Niles, IL, 60714

Verify this record

Cross-check NPI 1659560464 against the authoritative CMS record: view Dr John D Mcmahon Ltd on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

Where is Dr John D Mcmahon Ltd located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-01-16. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-01-16.