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

Steven John Antonini, MD

Individual provider Pediatrics Physician · NPI 1114004652

Steven John Antonini, MD is a Pediatric Medicine in Mokena, Illinois. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1986, 40 years ago. Practices with Health Service Systems, Inc, a 63-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
40
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

21205 Owens Rd Ste 3
Mokena, IL 60448-2023
Phone: (815) 469-2123
Fax: (815) 469-2149
Show map & directions

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

Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence 036076951 (IL)
Pediatrics Physician Taxonomy 208000000X · Licence 036-076951 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036076951 (IL)

Record details

NPI number1114004652
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESMarch 1, 2022
Certification dateMarch 1, 2022
Mailing address21205 Owens Rd Ste 3, Mokena, IL 60448-2023

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Health Service Systems, Inc — 63 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Mokena