Steven John Antonini, MD
Pediatrics Physician · Mokena, IL
Steven John Antonini, MD is a pediatrics physician with a practice address in Mokena, Illinois, and NPI 1114004652, issued on Nov 1, 2006. Check the license (Illinois 036076951, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Steven John Antonini
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- 036076951 IL
036-076951 IL
Self-reported in NPPES; status is on the state search - Practice location
- 21205 Owens RD Ste 3, Mokena, IL 60448
- Phone
- (815) 469-2123
- Enumerated
- Nov 1, 2006
- Record last updated
- Mar 1, 2022
- Fax
- (815) 469-2149
- Medicaid ID
- 036076951 IL
- Medicare enrollment
- Enrolled (PECOS I20101102001503); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,176 in Illinois → Look up another NPI →
Also registered at 21205 Owens RD Ste 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Demaertelaere, DOFamily Medicine Physician1982779237
- Aileen Donausky, MDPediatrics Physician1356416143
- Orest Horodysky, MDInternal Medicine Physician1689749475
- Jennifer Johnson, NP-CFamily Nurse Practitioner1346792397
- Julie Limon, MDFamily Medicine Physician1770635989
- Theresa Sawyer, FNP-BCNurse Practitioner1376178889
Verify Steven John Antonini 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 036076951Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% more Medicare Part D claims than the average pediatrics physician in 2024
496 Medicare Part D claims for 52 beneficiaries, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Atorvastatin Calcium75 claims
- Hydrochlorothiazide42 claims
- Levothyroxine Sodium38 claims
- Amoxicillin25 claims
- Lisinopril21 claims
- Rosuvastatin Calcium18 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.
Industry payments in 2024: $24.65
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Health Service Systems, IncNew Lenox, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven John Antonini among 3,176 pediatrics physician records in Illinois
Steven John Antonini, MD is one of 3,176 pediatrics physician records with a practice address in Illinois. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 32% of these records are
- In the CMS Doctors and Clinicians fileYes · 7% of these records are
- Graduated1986 · median 2010 among the 235 with a school on file
- Record last updated2022 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatrics Physician providers in Illinois
There are 3,176 pediatrics physician records in Illinois.
All 3,176 in Illinois → Every provider in Mokena → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Aileen Donausky, MDMokena, IL 604481356416143
- Adrian Nica, M.D.Mokena, IL 604481639288707
- Paul Panzica, M.D.Mokena, IL 604481295802882
- Joongsik Cho, MDMorris, IL 604501992776751
- Richard Johnson, MDMorris, IL 604501629153135
- Barbara Kijek, MDMorris, IL 604501508822149
- Jonette Belicena, MDNew Lenox, IL 604511134117344
- Sandra Ndiaye, D.O.New Lenox, IL 604511215236963
Common questions
What is Steven John Antonini, MD's NPI number?
Steven John Antonini, MD's National Provider Identifier (NPI) is 1114004652, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven John Antonini, MD located?
The NPPES record lists a practice address at 21205 Owens RD Ste 3, Mokena, IL, 60448. Phone: (815) 469-2123. Providers update this record themselves, so call before visiting.
How can I verify Steven John Antonini, MD's license?
NPPES lists Illinois license number 036076951, 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 Steven John Antonini, MD prescribe under Medicare Part D?
In 2024, Steven John Antonini, MD had 496 Medicare Part D claims for 52 beneficiaries; the average among pediatrics physician prescribers was 375. 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.