Quick answers
- Which hospitals does Steven J. Antonini work at?
- Medicare's official clinician data lists Steven J. Antonini at 1 hospital: Silver Cross Hospital and Medical Centers. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Steven J. Antonini see patients?
- Medicare's clinician data lists 2 practice locations, including New Lenox, IL. Call before your visit to confirm the address.
- What is Steven J. Antonini's specialty?
- Medicare lists Pediatric Medicine as the primary specialty, and also Internal Medicine.
- Does Steven J. Antonini accept Medicare assignment?
- Yes. Medicare's clinician data says Steven J. Antonini accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Steven J. Antonini?
- (815) 727-4292, as listed in official Medicare / NPI Registry data.
- What is Steven J. Antonini's NPI number?
- 1114004652. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Steven J. Antonini works
Medicare's Facility Affiliation Data lists Steven J. Antonini at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Silver Cross Hospital and Medical CentersNew Lenox, IL · Acute Care Hospital · CCN 140213
Practice locations
Addresses where Steven J. Antonini is enrolled with Medicare (CMS data updated 2026-10-02).
- 1890 Silver Cross Blvd, Suite 265New Lenox, IL 60451 (815) 727‑4292
- 1900 Silver Cross BlvdNew Lenox, IL 60451
Group practices
Medicare enrollment lists Steven J. Antonini as a member of this group (CMS data updated 2026-10-02).
- Health Service Systems, Inc68 clinicians in the group
Specialties
- Pediatric Medicineprimary
- Internal Medicinealso
Other pediatricians in New Lenox
Clinicians with the same Medicare primary specialty in New Lenox, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114004652 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians