DR. WILLIAM JOHN MCMAHON M.D.
NPI 1174893952
General Practice in Chicago, IL

Q: What is William Mcmahon's NPI number?

The NPI number for William Mcmahon is 1174893952. It was assigned to this individual provider in the NPPES registry on January 10, 2012.

Q: What is William Mcmahon's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Q: When was this NPI record last updated?

The NPPES record for William Mcmahon was last updated on January 10, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 10, 2012

10465 S SEELEY AVE, CHICAGO, IL 60643(773) 727-3642 Get Directions Write a Review

NPPES record last updated: January 10, 2012. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. William John Mcmahon M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM JOHN MCMAHON M.D. (NPI 1174893952) is an individual general practice provider in Chicago, Illinois, licensed in Illinois (036042137) and active in the NPI registry since January 2012.

NPPES Registry Identity

NPI1174893952

Entity TypeIndividualMale

Primary Taxonomy208D00000X

Provider Legal NameDR. WILLIAM JOHN MCMAHONCredential: M.D.

Location Address10465 S SEELEY AVEChicago, IL 60643-2630

Mailing Address10465 S Seeley AveChicago, IL 60643-2630 · (773) 727-3642

Phone(773) 727-3642

Sole ProprietorYes

Enumeration DateJanuary 10, 2012

✔ NPI 1174893952 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians

Taxonomy Code208D00000X

License✔ Licensed in IL · 036042137

Definition

A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

10465 S SEELEY AVE, Chicago, IL 60643

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Mcmahon's NPI number?

The NPI number for William Mcmahon is 1174893952. It was assigned to this individual provider in the NPPES registry on January 10, 2012.

Where is William Mcmahon located?

William Mcmahon practices at 10465 S Seeley Ave, Chicago, IL 60643. The listed phone number is (773) 727-3642.

What is William Mcmahon's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

When was this NPI record last updated?

The NPPES record for William Mcmahon was last updated on January 10, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.