Quick answers
- Which hospitals does Sunil John work at?
- Medicare's official clinician data lists Sunil John at 4 hospitals: Advocate Christ Hospital & Medical Center, Advocate Trinity Hospital, Riverside Medical Center and Silver Cross Hospital and Medical Centers. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sunil John see patients?
- Medicare's clinician data lists 4 practice locations, including South Holland, IL, Hazel Crest, IL and Buffalo Grove, IL. Call before your visit to confirm the address.
- What is Sunil John's specialty?
- Medicare lists Rheumatology as the primary specialty, and also Internal Medicine.
- Does Sunil John accept Medicare assignment?
- Yes. Medicare's clinician data says Sunil John 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.
- Does Sunil John offer telehealth?
- Medicare's clinician data says Sunil John offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Sunil John?
- (708) 730-2200, as listed in official Medicare / NPI Registry data.
- What is Sunil John's NPI number?
- 1427154665. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sunil John works
Medicare's Facility Affiliation Data lists Sunil John at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · CCN 140208
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · CCN 140048
- Riverside Medical CenterKankakee, IL · Acute Care Hospital · CCN 140186
- Silver Cross Hospital and Medical CentersNew Lenox, IL · Acute Care Hospital · CCN 140213
Practice locations
Addresses where Sunil John is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 W 162nd St, Advocate Med Grp S HollandSouth Holland, IL 60473 (708) 730‑2200
- 17800 Kedzie AveHazel Crest, IL 60429 (708) 684‑5340
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
- 9550 W 167th StOrland Park, IL 60467
Group practices
Medicare enrollment lists Sunil John as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1427154665 |
| 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