Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Gregory Stacy

Individual provider Diagnostic Radiology Physician · NPI 1952452922

Gregory Stacy practises Diagnostic Radiology in Chicago, Illinois. Graduated from Washington University School of Medicine in 1995, 31 years ago. Practices with University of Chicago, a 1,681-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois and Indiana.

Years since qualifying
31
Trained at
Washington University School of Medicine
Licensed in
IL, IN
In the registry since
2007
Specialties on file
2
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Practice location Address checks out

5841 S Maryland Ave
Chicago, IL 60637-1443
Phone: (888) 824-0200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 10855 Virginia St, Crown Point, IN 46307-0210 — (888) 824-0200

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 036097140 (IL)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 01091572A (IN)

Record details

NPI number1952452922
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJanuary 16, 2007
Last updated in NPPESFebruary 6, 2026
Certification dateFebruary 6, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolWASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice University Of Chicago — 1681 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,867
Services billed 3,257 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at University of Chicago

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1681 clinicians in the practice; 12 are shown here.

Other providers in Chicago