Quick answers
- Which hospitals does Mark Giacomin work at?
- Medicare's official clinician data lists Mark Giacomin at 1 hospital: Advocate Good Shepherd Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Giacomin see patients?
- Medicare's clinician data lists 3 practice locations, including Barrington, IL and Crystal Lake, IL. Call before your visit to confirm the address.
- What is Mark Giacomin's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Mark Giacomin accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Giacomin 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 Giacomin?
- (877) 346-2211, as listed in official Medicare / NPI Registry data.
- What is Mark Giacomin's NPI number?
- 1215948153. 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 Giacomin works
Medicare's Facility Affiliation Data lists Mark Giacomin 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
Practice locations
Addresses where Mark Giacomin is enrolled with Medicare (CMS data updated 2026-10-02).
- 450 W Hwy 22Barrington, IL 60010 (877) 346‑2211
- 450 W Il Route 22Barrington, IL 60010 (877) 346‑2211
- 525 E Congress Pkwy, Suite 100Crystal Lake, IL 60014 (626) 327‑6795
Group practices
Medicare enrollment lists Mark Giacomin as a member of these groups (CMS data updated 2026-10-02).
- Crystal Lake Immediate Care Physicians Ltd.17 clinicians in the group
- Tri-County Emergency Physicians Ltd17 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Barrington
Clinicians with the same Medicare primary specialty in Barrington, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Chicago College Of Osteopathy |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215948153 |
| 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