Quick answers
- Which hospitals does Tomasz A. Kosierkiewicz work at?
- Medicare's official clinician data lists Tomasz A. Kosierkiewicz at 5 hospitals: Clay County Hospital, Deaconess Illinois Crossroads, Good Samaritan Regional Health Center, SSM Health St Mary's Hospital -Centralia and Washington County Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Tomasz A. Kosierkiewicz see patients?
- Medicare's clinician data lists 2 practice locations, including Mount Vernon, IL. Call before your visit to confirm the address.
- What is Tomasz A. Kosierkiewicz's specialty?
- Medicare lists Neurology as the primary specialty.
- Does Tomasz A. Kosierkiewicz accept Medicare assignment?
- Yes. Medicare's clinician data says Tomasz A. Kosierkiewicz 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 Tomasz A. Kosierkiewicz?
- (618) 242-7350, as listed in official Medicare / NPI Registry data.
- What is Tomasz A. Kosierkiewicz's NPI number?
- 1487645776. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Tomasz A. Kosierkiewicz works
Medicare's Facility Affiliation Data lists Tomasz A. Kosierkiewicz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Clay County HospitalFlora, IL · Critical Access Hospital · CCN 141351
- Deaconess Illinois CrossroadsMount Vernon, IL · Acute Care Hospital · CCN 140294
- Good Samaritan Regional Health CenterMount Vernon, IL · Acute Care Hospital · CCN 140046
- SSM Health St Mary's Hospital -CentraliaCentralia, IL · Acute Care Hospital · CCN 140034
- Washington County HospitalNashville, IL · Critical Access Hospital · CCN 141308
Practice locations
Addresses where Tomasz A. Kosierkiewicz is enrolled with Medicare (CMS data updated 2026-10-02).
- 1007 S 42nd St, Suite 3Mount Vernon, IL 62864 (618) 242‑7350
- 4107 N Water Tower Pl, Suite CMount Vernon, IL 62864
Specialties
- Neurologyprimary
Other neurologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487645776 |
| 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