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Dr. Ellen G Chadwick, MD

Pediatric Infectious Diseases Physician in Chicago, IL · enumerated 2006.

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

National Provider Identifier

1669431078

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Registry record

Entity type Individual (Type 1)
Name Dr. Ellen G Chadwick
Credential MD
Sex Female
Practice address 225 E Chicago Ave # 20, Chicago, IL, 60611
Phone (312) 227-4000
Fax (312) 227-9709
Enumeration date Mar 23, 2006
Last updated in NPPES May 20, 2020

Taxonomy & licenses

2080P0208X Pediatric Infectious Diseases Physician Allopathic & Osteopathic Physicians · License 036063875 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
036063875 Medicaid IL -

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

What is the NPI number for Ellen Chadwick?
The National Provider Identifier (NPI) for Ellen Chadwick is 1669431078, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ellen Chadwick practice?
The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-20.