Quick answers
- Which hospitals does Gregory R. Olson work at?
- Medicare's official clinician data lists Gregory R. Olson at 2 hospitals: Advocate Christ Hospital & Medical Center and Northwestern Medicine Central Dupage Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory R. Olson see patients?
- Medicare's clinician data lists 1 practice location in Palos Heights, IL. Call before your visit to confirm the address.
- What is Gregory R. Olson's specialty?
- Medicare lists Infectious Disease as the primary specialty.
- Does Gregory R. Olson accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory R. Olson 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 Gregory R. Olson?
- (708) 361-5778, as listed in official Medicare / NPI Registry data.
- What is Gregory R. Olson's NPI number?
- 1326428103. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory R. Olson works
Medicare's Facility Affiliation Data lists Gregory R. Olson 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
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
Practice locations
Addresses where Gregory R. Olson is enrolled with Medicare (CMS data updated 2026-10-02).
- 7804 W College DrPalos Heights, IL 60463 (708) 361‑5778
Group practices
Medicare enrollment lists Gregory R. Olson as a member of this group (CMS data updated 2026-10-02).
- Southwest Infectious Disease and Internal Medicine S C11 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326428103 |
| 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