Quick answers
- Which hospitals does Marion Kowalewski work at?
- Medicare's official clinician data lists Marion Kowalewski at 5 hospitals: Greater Baltimore Medical Center, Johns Hopkins Bayview Medical Center, Mercy Medical Center Inc, Umd Upper Chesapeake Medical Center and University of MD St Joseph Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marion Kowalewski see patients?
- Medicare's clinician data lists 2 practice locations, including Forest Hill, MD and Baltimore, MD. Call before your visit to confirm the address.
- What is Marion Kowalewski's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Marion Kowalewski accept Medicare assignment?
- Yes. Medicare's clinician data says Marion Kowalewski 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 Marion Kowalewski?
- (410) 663-8100, as listed in official Medicare / NPI Registry data.
- What is Marion Kowalewski's NPI number?
- 1538126461. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marion Kowalewski works
Medicare's Facility Affiliation Data lists Marion Kowalewski at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Greater Baltimore Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210044
- Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · CCN 210029
- Mercy Medical Center IncBaltimore, MD · Acute Care Hospital · CCN 210008
- Umd Upper Chesapeake Medical CenterBel Air, MD · Acute Care Hospital · CCN 210049
- University of MD St Joseph Medical CenterTowson, MD · Acute Care Hospital · CCN 210063
Practice locations
Addresses where Marion Kowalewski is enrolled with Medicare (CMS data updated 2026-10-02).
- 12 Newport Dr, Suite AForest Hill, MD 21050
- 7602 Belair RdBaltimore, MD 21236 (410) 663‑8100
Group practices
Medicare enrollment lists Marion Kowalewski as a member of these groups (CMS data updated 2026-10-02).
- Agape Physical Therapy and Sports Rehabilitation LP678 clinicians in the group
- Maryland Family Care Inc157 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Forest Hill
Clinicians with the same Medicare primary specialty in Forest Hill, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538126461 |
| 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