Nicholas John Peacock, D.O.
Emergency Medicine Physician · Oak Park, IL
Nicholas John Peacock, D.O. is an emergency medicine physician with a practice address in Oak Park, Illinois, and NPI 1619316304, issued on Jun 17, 2013. Check the license (Illinois 036142666, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Nicholas John Peacock
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 036142666 IL
Self-reported in NPPES; status is on the state search - Practice location
- 520 S Maple Ave, Oak Park, IL 60304
- Phone
- (708) 660-5995
- Enumerated
- Jun 17, 2013
- Record last updated
- Jul 21, 2022
- Fax
- (708) 660-2251
- Medicare enrollment
- Enrolled (PECOS I20170801001650); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2013
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 520 S Maple Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Aguinaldo, M.D.Emergency Medicine Physician1306877220
- Hayley Altshuler, PA-CPhysician Assistant1396490991
- Saadia Alvi, M.D.Endocrinology, Diabetes & Metabolism Physician1568682177
- Jessie Amstadt, RN, AA-SANERegistered Nurse1730995762
- Elizabeth Bassett, CRNACertified Registered Nurse Anesthetist1053717033
- Cynthia Batassa, DPTPhysical Therapist1487186730
Verify Nicholas John Peacock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036142666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% more Medicare Part D claims than the average emergency medicine physician in 2024
241 Medicare Part D claims for 164 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 34 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen31 claims
- Ondansetron Odt22 claims
- Amoxicillin-Clavulanate Potass18 claims
- Methylprednisolone16 claims
- Tizanidine Hcl13 claims
- Ibuprofen12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Rush Oak Park ER Physicians GroupOak Park, IL
- Rush University Medical GroupOak Park, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicholas John Peacock among 3,291 emergency medicine physician records in Illinois
Nicholas John Peacock, D.O. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 56% of them.
- NPI issued2013 · 56% of these records are older, 41% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2013 · median 2012 among the 1,867 with a school on file
- Record last updated2022 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 emergency medicine physician records list a practice address in Oak Park
They are 28 of the 2,307 NPPES records with a practice address in Oak Park, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Oak Park → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Maria Aguinaldo, M.D.Oak Park, IL 603041306877220
- Dean Balabanov, DOOak Park, IL 603041750902409
- Daniel Cotter, MDOak Park, IL 603041861071151
- Bryce De Venecia, MDOak Park, IL 603041568091924
- Robert June, M.D.Oak Park, IL 603041871528059
- Johnathan Lewis, DOOak Park, IL 603041417517236
- Tedjitou Martin, PAOak Park, IL 603041053454926
- Daniel Noonan, M.D.Oak Park, IL 603041669404620
Common questions
What is Nicholas John Peacock, D.O.'s NPI number?
Nicholas John Peacock, D.O.'s National Provider Identifier (NPI) is 1619316304, issued on Jun 17, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas John Peacock, D.O. located?
The NPPES record lists a practice address at 520 S Maple Ave, Oak Park, IL, 60304. Phone: (708) 660-5995. Providers update this record themselves, so call before visiting.
How can I verify Nicholas John Peacock, D.O.'s license?
NPPES lists Illinois license number 036142666, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nicholas John Peacock, D.O. prescribe under Medicare Part D?
In 2024, Nicholas John Peacock, D.O. had 241 Medicare Part D claims for 164 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.