Quick answers
- Which hospitals does Mark E. Fesenmyer work at?
- Medicare's official clinician data lists Mark E. Fesenmyer at 3 hospitals: Community Hospital, St Catherine Hospital Inc and St Mary Medical Center Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark E. Fesenmyer see patients?
- Medicare's clinician data lists 2 practice locations, including Valparaiso, IN and Hobart, IN. Call before your visit to confirm the address.
- What is Mark E. Fesenmyer's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Mark E. Fesenmyer accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. Fesenmyer 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 E. Fesenmyer?
- (219) 947-6122, as listed in official Medicare / NPI Registry data.
- What is Mark E. Fesenmyer's NPI number?
- 1992770390. 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 E. Fesenmyer works
Medicare's Facility Affiliation Data lists Mark E. Fesenmyer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Community HospitalMunster, IN · Acute Care Hospital · CCN 150125
- St Catherine Hospital IncEast Chicago, IN · Acute Care Hospital · CCN 150008
- St Mary Medical Center IncHobart, IN · Acute Care Hospital · CCN 150034
Practice locations
Addresses where Mark E. Fesenmyer is enrolled with Medicare (CMS data updated 2026-10-02).
- 3800 Saint Mary Rd, Suite 101Valparaiso, IN 46383 (219) 947‑6122
- 7835 Grand BlvdHobart, IN 46342 (219) 945‑4499
Group practices
Medicare enrollment lists Mark E. Fesenmyer as a member of this group (CMS data updated 2026-10-02).
- Community Care Network Inc379 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Valparaiso
Clinicians with the same Medicare primary specialty in Valparaiso, IN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1992770390 |
| 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