Quick answers
- Which hospitals does Mark D. Sack work at?
- Medicare's official clinician data lists Mark D. Sack at 2 hospitals: Advocate Christ Hospital & Medical Center and OSF Little Company of Mary Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Sack see patients?
- Medicare's clinician data lists 2 practice locations, including Bartlett, IL and Chicago, IL. Call before your visit to confirm the address.
- What is Mark D. Sack's specialty?
- Medicare lists Podiatry as the primary specialty.
- Does Mark D. Sack accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Sack 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 D. Sack?
- (630) 483-2212, as listed in official Medicare / NPI Registry data.
- What is Mark D. Sack's NPI number?
- 1548286313. 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 D. Sack works
Medicare's Facility Affiliation Data lists Mark D. Sack 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
- OSF Little Company of Mary Medical CenterEvergreen Park, IL · Acute Care Hospital · CCN 140179
Practice locations
Addresses where Mark D. Sack is enrolled with Medicare (CMS data updated 2026-10-02).
- 108 W Bartlett AveBartlett, IL 60103 (630) 483‑2212
- 3216 W 115th StChicago, IL 60655 (773) 238‑7270
Group practices
Medicare enrollment lists Mark D. Sack as a member of this group (CMS data updated 2026-10-02).
- D and S Podiatry LLC2 clinicians in the group
Specialties
- Podiatryprimary
Other podiatrists in Bartlett
Clinicians with the same Medicare primary specialty in Bartlett, IL — not a recommendation.
Clinician information
| Credential | DPM |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548286313 |
| 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