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

Dr. Dennis Alan Peacock, MD

Individual provider Internal Medicine Physician · NPI 1023223021

Dr. Dennis Alan Peacock, MD practises Internal Medicine in Chicago, Illinois. Graduated from University of Tennessee, Hsc, College of Medicine in 2004, 22 years ago. Practices with Loyola University Medical Center, a 946-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois and Louisiana.

Years since qualifying
22
Trained at
University of Tennessee, Hsc, College of Medicine
Licensed in
IL, LA
In the registry since
2007
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1333 W Belmont Ave Ste 100
Chicago, IL 60657
Phone: (312) 694-2273
Fax: (312) 694-1875
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 635 N Dearborn St Ste 100, Chicago, IL 60654-4618 — (312) 694-2273

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036.141382 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 200700 (LA)
Pediatrics Physician Taxonomy 208000000X · Licence 036.141382 (IL)
Pediatrics Physician Taxonomy 208000000X · Licence 200700 (LA)

Record details

NPI number1023223021
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 11, 2007
Last updated in NPPESMay 27, 2022
Certification dateMay 27, 2022

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesPEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF TENNESSEE, HSC, COLLEGE OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Loyola University Medical Center — 946 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients166
Services billed 171 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Loyola University Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 946 clinicians in the practice; 12 are shown here.

Other providers in Chicago