Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Nicholas John Peacock, DO

Individual provider Emergency Medicine Physician · NPI 1619316304

Dr. Nicholas John Peacock, DO practises Emergency Medicine in Oak Park, Illinois. Graduated from Philadelphia College of Osteopathic Medicine in 2013, 13 years ago. Practices with Rush University Medical Group, a 1,499-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
13
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
IL
In the registry since
2013
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

520 S Maple Ave
Oak Park, IL 60304-1022
Phone: (708) 660-5995
Fax: (708) 660-2251
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036142666 (IL)

Record details

NPI number1619316304
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedJune 17, 2013
Last updated in NPPESJuly 21, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2013 (13 years in practice)
Group practice Rush University Medical Group — 1499 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 patients289
Services billed 343 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 Rush University Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1499 clinicians in the practice; 12 are shown here.

Other providers in Oak Park