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Ellen J Gustafson, MD

Hematology & Oncology Physician in Joliet, IL · enumerated 2006.

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

National Provider Identifier

1245296896

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Registry record

Entity type Individual (Type 1)
Name Ellen J Gustafson
Credential MD
Sex Female
Practice address 2614 W Jefferson St, Joliet, IL, 60435
Phone (815) 725-1355
Fax (815) 725-9857
Enumeration date Apr 24, 2006
Last updated in NPPES Apr 25, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 036109139 (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
K26698 Other IL MEDICARE INDIV ID# FOR GROUP 208256
K26699 Other IL MEDICARE INDIV ID# FOR GROUP 336140
036109139 Medicaid IL -
K26697 Other IL MEDICARE INDIV ID# FOR GROUP 205474
P00307129 Other IL MEDICARE RR

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 specialty is Ellen Gustafson?
Ellen Gustafson is registered in NPPES with the primary taxonomy of Hematology & Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-25.