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

Erik Leroy Zeger, MD

Individual provider Hematology & Oncology Physician · NPI 1639188659

Erik Leroy Zeger, MD is a Medical Oncology in Wynnewood, Pennsylvania. Graduated from Hahnemann University College of Medicine in 1999, 27 years ago. Practices with Alliance Cancer Specialists PC, a 44-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
27
Trained at
Hahnemann University College of Medicine
Licensed in
PA
In the registry since
2006
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

100 Lancaster Ave Main Line Oncology Hematology Associates
Wynnewood, PA 19096
Phone: (610) 645-2494
Fax: (610) 645-4456
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence MD425881 (PA)

Record details

NPI number1639188659
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 7, 2006
Last updated in NPPESSeptember 3, 2019

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolHAHNEMANN UNIVERSITY COLLEGE OF MEDICINE
Graduated 1999 (27 years in practice)
Group practice Alliance Cancer Specialists P.C. — 44 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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