Quick answers
- Which hospitals does Mark E. Peterson work at?
- Medicare's official clinician data lists Mark E. Peterson at 4 hospitals: Advocate Christ Hospital & Medical Center, Advocate Good Samaritan Hospital, Copley Memorial Hospital and Northwestern Medicine Kishwaukee Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark E. Peterson see patients?
- Medicare's clinician data lists 1 practice location in Oswego, IL. Call before your visit to confirm the address.
- What is Mark E. Peterson's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mark E. Peterson accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. Peterson 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 Mark E. Peterson offer telehealth?
- Medicare's clinician data says Mark E. Peterson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark E. Peterson?
- (630) 554-3456, as listed in official Medicare / NPI Registry data.
- What is Mark E. Peterson's NPI number?
- 1114030384. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark E. Peterson works
Medicare's Facility Affiliation Data lists Mark E. Peterson 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 Good Samaritan HospitalDowners Grove, IL · Acute Care Hospital · CCN 140288
- Copley Memorial HospitalAurora, IL · Acute Care Hospital · CCN 140029
- Northwestern Medicine Kishwaukee HospitalDekalb, IL · Acute Care Hospital · CCN 140286
Practice locations
Addresses where Mark E. Peterson is enrolled with Medicare (CMS data updated 2026-10-02).
- 80 Templeton DrOswego, IL 60543 (630) 554‑3456
Group practices
Medicare enrollment lists Mark E. Peterson as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Oswego
Clinicians with the same Medicare primary specialty in Oswego, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1114030384 |
| 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