Quick answers
- Does Margaret W. Lowenstein accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret W. Lowenstein accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Margaret W. Lowenstein's NPI number?
- 1326381872. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margaret W. Lowenstein works
Medicare's Facility Affiliation Data lists Margaret W. Lowenstein at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Penn Presbyterian Medical CenterPhiladelphia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390223
Practice locations
Addresses where Margaret W. Lowenstein is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 3400 Spruce StPhiladelphia, PA 19104
- 3600 Civic Ctr BlvdPhiladelphia, PA 19104
- 3701 Market StPhiladelphia, PA 19104
- 3737 Market StPhiladelphia, PA 19104 (215) 662‑8777
- 3801 Filbert St, Penn Center for Primary CarePhiladelphia, PA 19104 (215) 662‑9990
Group practices
Medicare enrollment lists Margaret W. Lowenstein as a member of these groups (CMS data updated October 2, 2026).
- University of Penn - Medical Group3,505 clinicians in the group
- Trustees of the University of Pennsylvania157 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in Philadelphia
Clinicians with the same Medicare primary specialty in Philadelphia, PA — not a recommendation.
Other clinicians in University of Penn - Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326381872 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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