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Dr. Catherine Elise Duffy, MD

Pediatric Cardiology Physician in Chicago, IL · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1215905922

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Registry record

Entity type Individual (Type 1)
Name Dr. Catherine Elise Duffy
Credential MD
Sex Female
Practice address 2300 Childrens Plaza, Box 21 Childrens Memorial Hospital, Chicago, IL, 60614
Phone (773) 880-4553
Fax (773) 880-8111
Enumeration date Mar 9, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2080P0202X Pediatric Cardiology Physician Allopathic & Osteopathic Physicians Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Catherine Duffy's NPI record?
Cross-check NPI 1215905922 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1215905922 active?
Yes, as of the latest NPPES snapshot, NPI 1215905922 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.