Provider Profile
John E. Duffy
Unclaimed ProfileAbout John Duffy
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Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Contact Information
- (312) 623-2293
- Email not available
Practice Locations
235 W VAN BUREN ST UNIT 2103
Chicago, IL 60607
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
What does John E. Duffy specialize in?
John E. Duffy is a registered nurse in Chicago, IL. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is John E. Duffy located?
John E. Duffy is listed at 235 W Van Buren St Unit 2103, Chicago, IL 60607. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John E. Duffy's phone number?
The number on file is (312) 623-2293. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is John E. Duffy's NPI number?
John E. Duffy's National Provider Identifier is 1255250338. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Has John E. Duffy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by John E. Duffy. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.