Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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William Brian Duffy, MD

Individual provider Nephrology Physician · NPI 1568448363

William Brian Duffy, MD is a Nephrology Physician in Chicago, Illinois. Licensed in Illinois. Registered with an NPI since 2005.

Licensed in
IL
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1101 S Canal St
Chicago, IL 60607-4901
Phone: (312) 986-0110
Fax: (312) 663-1010
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 036057381 (IL)

Record details

NPI number1568448363
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 22, 2005
Last updated in NPPESJanuary 3, 2012
Mailing address1101 S Canal St, Chicago, IL 60607-4901

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