Quick answers
- Which hospitals does Mark W. Stolar work at?
- Medicare's official clinician data lists Mark W. Stolar at 5 hospitals: Northwestern Lake Forest Hospital, Northwestern Medicine Central Dupage Hospital, Northwestern Medicine McHenry, Northwestern Memorial Hospital and Palos Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark W. Stolar see patients?
- Medicare's clinician data lists 1 practice location in Woodstock, IL. Call before your visit to confirm the address.
- What is Mark W. Stolar's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Endocrinology.
- Does Mark W. Stolar accept Medicare assignment?
- Yes. Medicare's clinician data says Mark W. Stolar 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 W. Stolar offer telehealth?
- Medicare's clinician data says Mark W. Stolar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mark W. Stolar?
- (815) 338-6600, as listed in official Medicare / NPI Registry data.
- What is Mark W. Stolar's NPI number?
- 1396784591. 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 W. Stolar works
Medicare's Facility Affiliation Data lists Mark W. Stolar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · CCN 140281
- Palos Community HospitalPalos Heights, IL · Acute Care Hospital · CCN 140062
Practice locations
Addresses where Mark W. Stolar is enrolled with Medicare (CMS data updated 2026-10-02).
- 3707 Doty RdWoodstock, IL 60098 (815) 338‑6600
Group practices
Medicare enrollment lists Mark W. Stolar as a member of this group (CMS data updated 2026-10-02).
- Central Dupage Physician Group1,080 clinicians in the group
Specialties
- Internal Medicineprimary
- Endocrinologyalso
Other internal medicine doctors in Woodstock
Clinicians with the same Medicare primary specialty in Woodstock, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1979 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1396784591 |
| 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