Quick answers
- Which hospitals does Leonard W. Ostrowski work at?
- Medicare's official clinician data lists Leonard W. Ostrowski at 5 hospitals: Franciscan Health Crown Point, Franciscan Health Michigan City, Methodist Hospitals Inc, Northwest Health - Porter and St Mary Medical Center Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Leonard W. Ostrowski see patients?
- Medicare's clinician data lists 7 practice locations, including Valparaiso, IN, Glenview, IL and Chesterton, IN. Call before your visit to confirm the address.
- What is Leonard W. Ostrowski's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Leonard W. Ostrowski accept Medicare assignment?
- Yes. Medicare's clinician data says Leonard W. Ostrowski 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 Leonard W. Ostrowski?
- (219) 548-3843, as listed in official Medicare / NPI Registry data.
- What is Leonard W. Ostrowski's NPI number?
- 1881691947. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Leonard W. Ostrowski works
Medicare's Facility Affiliation Data lists Leonard W. Ostrowski at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Franciscan Health Crown PointCrown Point, IN · Acute Care Hospital · CCN 150126
- Franciscan Health Michigan CityMichigan City, IN · Acute Care Hospital · CCN 150015
- Methodist Hospitals IncGary, IN · Acute Care Hospital · CCN 150002
- Northwest Health - PorterValparaiso, IN · Acute Care Hospital · CCN 150035
- St Mary Medical Center IncHobart, IN · Acute Care Hospital · CCN 150034
Practice locations
Addresses where Leonard W. Ostrowski is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1300 LincolnwayValparaiso, IN 46383
- 2505 Calumet AveValparaiso, IN 46383 (219) 548‑3843
- 2600 Compass RdGlenview, IL 60026
- 425 Sand Creek Dr, Suite CChesterton, IN 46304
- 6050 Sterling Creek RdPortage, IN 46368
Group practices
Medicare enrollment lists Leonard W. Ostrowski as a member of these groups (CMS data updated 2026-10-02).
- Select Rehabilitation, LLC2,046 clinicians in the group
- Rci (WRS) LLC360 clinicians in the group
- Chesterton Physical Therapy Inc186 clinicians in the group
- Porter Physician Services LLC99 clinicians in the group
- Northshore Health Centers Inc33 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Valparaiso
Clinicians with the same Medicare primary specialty in Valparaiso, IN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881691947 |
| 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