Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Marisa Gefen, MD

Individual provider Internal Medicine Physician · NPI 1386846806

Dr. Marisa Gefen, MD practises Internal Medicine in Philadelphia, Pennsylvania. Qualified in 2007, 19 years ago. Practices with Osh - PA Physicians Group, PC, a 114-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
19
Licensed in
PA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

37 S 40th St
Philadelphia, PA 19104-3042
Phone: (215) 444-7470
Fax: (215) 764-6556
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1113 Carlisle Rd, York, PA 17404-4939 — (717) 200-1567

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD439866 (PA)

Record details

NPI number1386846806
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 5, 2007
Last updated in NPPESApril 30, 2025
Certification dateApril 30, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Osh - Pa Physicians Group, Pc — 114 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients21
Services billed 69 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Osh - PA Physicians Group, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 114 clinicians in the practice; 12 are shown here.

Other providers in Philadelphia