Marina Katsnelson, MD

Medicare activity in 2024

Official CMS public-use data for Marina Katsnelson, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol58%
• High blood pressure55%
• Arthritis52%
• Osteoporosis35%

Hospitals where Marina Katsnelson works

Medicare's Facility Affiliation Data lists Marina Katsnelson 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.

• Hospital of University of PennsylvaniaPhiladelphia, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390111
• Pennsylvania HospitalPhiladelphia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390226

Practice locations

Addresses where Marina Katsnelson is enrolled with Medicare (CMS data updated October 2, 2026).

• 3701 Market St 3rd Floor, Penn Ob/gyn AssociatesPhiladelphia, PA 19104 (215) 662‑6035

Group practices

Medicare enrollment lists Marina Katsnelson as a member of this group (CMS data updated October 2, 2026).

• University of Penn - Medical Group3,505 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in Pennsylvania →

Other OB-GYNs in Philadelphia

Clinicians with the same Medicare primary specialty in Philadelphia, PA — not a recommendation.

• Osnat Geifman Holtzman, MD
• Ruth Woldemichael, MD
• Laurel Thomas, MD
• Hyun Joo Lee, MD
• Moti Gulersen, MD
• Julia Burd, MD
• Stephanie H. Ewing, MD
• Kathleen E. Oneill, MD

All OB-GYNs in Philadelphia →

Other clinicians in University of Penn - Medical Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Catherine West, NP
• Kelvin Wang, MD
• Shwetha Sudhakar, MD
• Alvand Hassankhani, MD
• Maeve Gilhooley, NP
• Danielle K. Sandsmark, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians