Quick answers
- Which hospitals does Mark B. Saker work at?
- Medicare's official clinician data lists Mark B. Saker at 5 hospitals: Advocate Good Shepherd Hospital, Advocate Illinois Masonic Medical Center, Community First Medical Center, Northwest Community Hospital 1 and Northwestern Medicine McHenry. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark B. Saker see patients?
- Medicare's clinician data lists 15 practice locations, including Chicago, IL, Park Ridge, IL and Buffalo Grove, IL. Call before your visit to confirm the address.
- What is Mark B. Saker's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Mark B. Saker accept Medicare assignment?
- Yes. Medicare's clinician data says Mark B. Saker 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 B. Saker?
- (630) 368-1771, as listed in official Medicare / NPI Registry data.
- What is Mark B. Saker's NPI number?
- 1881783140. 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 B. Saker works
Medicare's Facility Affiliation Data lists Mark B. Saker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · CCN 140291
- Advocate Illinois Masonic Medical CenterChicago, IL · Acute Care Hospital · CCN 140182
- Community First Medical CenterChicago, IL · Acute Care Hospital · CCN 140251
- Northwest Community Hospital 1Arlington Heights, IL · Acute Care Hospital · CCN 140252
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
Practice locations
Addresses where Mark B. Saker is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 15; the Medicare profile lists all.
- 1435 W Webster AveChicago, IL 60614 (630) 368‑1771
- 1775 Dempster StPark Ridge, IL 60068 (847) 723‑2210
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
- 3021 N Sheffield AveChicago, IL 60657 (872) 843‑0550
- 3134 N Clark StChicago, IL 60657 (773) 296‑5420
Group practices
Medicare enrollment lists Mark B. Saker as a member of these groups (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
- Integrated Imaging Consultants LLC159 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881783140 |
| 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