Quick answers
- Which hospitals does Rajeev Nayar work at?
- Medicare's official clinician data lists Rajeev Nayar at 4 hospitals: Humboldt Park Health, Northwestern Lake Forest Hospital, Northwestern Memorial Hospital and Presence Saints Mary and Elizabeth Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Rajeev Nayar see patients?
- Medicare's clinician data lists 3 practice locations, including Oakbrook Terrace, IL, Chicago, IL and Lake Forest, IL. Call before your visit to confirm the address.
- What is Rajeev Nayar's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Rajeev Nayar accept Medicare assignment?
- Yes. Medicare's clinician data says Rajeev Nayar 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 Rajeev Nayar?
- (630) 889-9889, as listed in official Medicare / NPI Registry data.
- What is Rajeev Nayar's NPI number?
- 1346217023. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Rajeev Nayar works
Medicare's Facility Affiliation Data lists Rajeev Nayar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Humboldt Park HealthChicago, IL · Acute Care Hospital · CCN 140206
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
- Presence Saints Mary and Elizabeth Medical CenterChicago, IL · Acute Care Hospital · CCN 140180
Practice locations
Addresses where Rajeev Nayar is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 S280 Summit AveOakbrook Terrace, IL 60181 (630) 889‑9889
- 3740 W N AveChicago, IL 60647 (630) 889‑9889
- 800 N Westmoreland Rd, Suite 100Lake Forest, IL 60045 (847) 535‑8174
Group practices
Medicare enrollment lists Rajeev Nayar as a member of these groups (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- David C Chua MDSC Ltd2 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Oakbrook Terrace
Clinicians with the same Medicare primary specialty in Oakbrook Terrace, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346217023 |
| 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