What is William Duffy's NPI number?

William Duffy's National Provider Identifier (NPI) is 1568448363, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Duffy's specialty?

William Duffy is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is William Duffy located?

William Duffy's practice location on file with NPPES is 1101 S Canal St, Chicago, IL 60607-4901.

What is William Duffy's phone number?

The practice phone number listed in the NPPES registry for William Duffy is (312) 986-0110.

Is William Duffy's NPI active?

Yes — William Duffy's NPI (1568448363) is active in the NPPES registry as of the last update on 2012-01-03.

IndividualActive

William Duffy, MD

NPI 1568448363 · Nephrology Physician · Chicago, IL

William Duffy, MD is a Nephrology Physician provider in Chicago, IL (NPI 1568448363).

Provider details

NPI number: 1568448363
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 036057381 (IL)

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense 036057381 (IL)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(91/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1101 S Canal St

Chicago, IL 60607-4901

Phone: (312) 986-0110

Fax: (312) 663-1010

Street-level locationGet directions

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Mailing address