Quick answers
- Which hospitals does Mark J. Holterman work at?
- Medicare's official clinician data lists Mark J. Holterman at 1 hospital: Northwestern Medicine Central Dupage Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark J. Holterman see patients?
- Medicare's clinician data lists 1 practice location in Oak Brook, IL. Call before your visit to confirm the address.
- What is Mark J. Holterman's specialty?
- Medicare lists General Surgery as the primary specialty, and also Pediatric Medicine.
- Does Mark J. Holterman accept Medicare assignment?
- Yes. Medicare's clinician data says Mark J. Holterman 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 Mark J. Holterman?
- (630) 282-6002, as listed in official Medicare / NPI Registry data.
- What is Mark J. Holterman's NPI number?
- 1033168273. 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 J. Holterman works
Medicare's Facility Affiliation Data lists Mark J. Holterman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
Practice locations
Addresses where Mark J. Holterman is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 S210 Summit AveOak Brook, IL 60181 (630) 282‑6002
Group practices
Medicare enrollment lists Mark J. Holterman as a member of this group (CMS data updated 2026-10-02).
- Dupage Immediate Care, Ltd3 clinicians in the group
Specialties
- General Surgeryprimary
- Pediatric Medicinealso
Other general surgeons in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Virginia School Of Medicine |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1033168273 |
| 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