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WILLIAM BRIAN DUFFY MD
NPI 1568448363
Internal Medicine - Nephrology in Chicago, IL

Active since December 22, 2005
1101 S CANAL ST, CHICAGO, IL 60607(312) 986-0110(312) 663-1010 Get Directions Write a Review

NPPES record last updated: January 3, 2012. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William Brian Duffy Md NPPES

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

WILLIAM BRIAN DUFFY MD (NPI 1568448363) is an individual nephrology provider in Chicago, Illinois, licensed in Illinois (036057381) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1568448363
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameWILLIAM BRIAN DUFFYCredential: MD
Location Address1101 S CANAL STChicago, IL 60607-4901
Mailing Address1101 S Canal StChicago, IL 60607-4901 · (312) 986-0110 · Fax (312) 663-1010
Phone(312) 986-0110
Fax(312) 663-1010
Sole ProprietorNo
Enumeration DateDecember 22, 2005
Last NPPES UpdateJanuary 3, 2012
✔ NPI 1568448363 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in IL · 036057381
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1101 S CANAL ST, Chicago, IL 60607
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Other Identifiers 4

Other01621679IL · Bcbs Of Il
Medicare ID-Type UnspecifiedK05443IL · Group 950150
Medicaid036057381IL
Medicare UPIND 89297IL

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BRETT CURTISS R.D., L.D.N.
Dietitian, Registered (Nutrition, Renal)
1101 S CANAL ST
CHICAGO, IL 60607
Cook County (630) 854-8476
CHELSEA LEIGH FOURNIER
Family Medicine
1101 S CANAL ST
CHICAGO, IL 60607
Cook County (888) 824-0200
VICTORIA WHITMAN
Optometrist
1101 S CANAL ST
CHICAGO, IL 60607
Cook County (312) 588-0159
VISIONWORKS INC
Eyewear Supplier
1101 S CANAL ST, STE 108
CHICAGO, IL 60607
Cook County (312) 588-0159
ISD RENAL INC
Clinic/Center (End-Stage Renal Disease (ESRD) Treatment)
1101 S CANAL ST
CHICAGO, IL 60607
Cook County (312) 341-2543
BC NUTRITION LLC
Dietitian, Registered (Nutrition, Renal)
1101 S CANAL ST
CHICAGO, IL 60607
Cook County (630) 854-8476
NIKULKUMAR PATEL O.D.
Optometrist
1101 S CANAL ST, SUITE 108
CHICAGO, IL 60607
Cook County (312) 588-0159
DR. LOYAL SHIN NELSON D.C.
Chiropractor
1101 S CANAL ST, STE 101
CHICAGO, IL 60607
Cook County (312) 854-8500

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 Duffy's NPI number?

The NPI number for William Duffy is 1568448363. It was assigned to this individual provider in the NPPES registry on December 22, 2005.

Where is William Duffy located?

William Duffy practices at 1101 S Canal St, Chicago, IL 60607. The listed phone number is (312) 986-0110.

What is William Duffy's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

When was this NPI record last updated?

The NPPES record for William Duffy was last updated on January 3, 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.