DR. JOHN WILLIAM CLANCY DDS
NPI 1821155920
Dentist - General Practice in Glen Ellyn, IL

Q: What is John Clancy's NPI number?

The NPI number for John Clancy is 1821155920. It was assigned to this individual provider in the NPPES registry on January 2, 2007.

Q: What is John Clancy's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: When was this NPI record last updated?

The NPPES record for John Clancy was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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 02, 2007

22 N PARK BLVD, GLEN ELLYN, IL 60137(630) 858-3321 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. John William Clancy Dds NPPES

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

DR. JOHN WILLIAM CLANCY DDS (NPI 1821155920) is an individual general practice provider in Glen Ellyn, Illinois and active in the NPI registry since January 2007.

NPPES Registry Identity

NPI1821155920

Entity TypeIndividualMale

Primary Taxonomy1223G0001X

Provider Legal NameDR. JOHN WILLIAM CLANCYCredential: DDS

Location Address22 N PARK BLVDGlen Ellyn, IL 60137-5770

Mailing Address22 N Park BlvdGlen Ellyn, IL 60137-5770 · (630) 858-3321

Phone(630) 858-3321

Sole ProprietorNo

Enumeration DateJanuary 2, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1821155920 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

22 N PARK BLVD, Glen Ellyn, IL 60137

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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 John Clancy's NPI number?

The NPI number for John Clancy is 1821155920. It was assigned to this individual provider in the NPPES registry on January 2, 2007.

Where is John Clancy located?

John Clancy practices at 22 N Park Blvd, Glen Ellyn, IL 60137. The listed phone number is (630) 858-3321.

What is John Clancy's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

When was this NPI record last updated?

The NPPES record for John Clancy was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.