Quick answers
- Where does Andrew Oleksyn see patients?
- Medicare's clinician data lists 24 practice locations, including Oak Brook, IL, Chicago, IL and Bloomingdale, IL. Call before your visit to confirm the address.
- What is Andrew Oleksyn's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Andrew Oleksyn accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew Oleksyn 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 Andrew Oleksyn?
- (630) 358-4414, as listed in official Medicare / NPI Registry data.
- What is Andrew Oleksyn's NPI number?
- 1992732754. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Andrew Oleksyn is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 24; the Medicare profile lists all.
- 1001 Commerce DrOak Brook, IL 60523
- 1333 W Belmont AveChicago, IL 60657
- 233 S Gary AveBloomingdale, IL 60108 (630) 358‑4414
- 233 S Gary Ave, Suite 100Bloomingdale, IL 60108 (630) 225‑2663
- 235 S Gary Ave, Suite 100Bloomingdale, IL 60108 (630) 893‑9600
Group practices
Medicare enrollment lists Andrew Oleksyn as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Oak Brook
Clinicians with the same Medicare primary specialty in Oak Brook, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Chicago College Of Osteopathy |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1992732754 |
| 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
- 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