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Internist, Hematology Specialist, Oncology Specialist (cancer)
28 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (3)

The overall average patient rating of Dr. Mark Weiss is Excellent. Dr. Weiss has been reviewed by 5 patients who have provided 3 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.7
Promptness 3.9
Courteous Staff 4.7
Accurate Diagnosis 5.0
Bedside Manner 4.2
Spends Time with Me 4.2
Follows Up After Visit 4.2

Specialties & Research

Dr. Mark Weiss, MD is board certified in Internal Medicine and Medical Oncology.

  • He has special expertise in 15 areas:
  • Acute Myeloid Leukemia
  • Adult T-Cell Leukemia-Lymphoma
  • Cancer
  • Chronic B-Cell Lymphocytic Leukemia
  • Chronic BCR-ABL Positive Myelogenous Leukemia
  • Chronic Myeloid Leukemia
  • Chronic Myelomonocytic Leukemia
  • Deep Vein Thrombosis
  • Epidemiology
  • Hepatitis C
  • Hodgkin Disease
  • Leukemia
  • Lymphocytic Leukemia
  • Lymphoma
  • Precursor Cell Lymphoblastic Leukemia-Lymphoma

Education & Awards

Dr. Weiss graduated from Cornell University, New York.


Dr. Weiss has 3 hospital affiliations:

  • Memorial Sloan-Kettering 
  • Thomas Jefferson University Hospital 
  • Memorial Hospital For Cancer And Allied Diseases 


  • Italian
  • Mandarin
  • Russian
  • Greek
  • French
  • Chinese
  • Spanish
  • Cantonese

> > > > Dr. Mark Weiss, MD

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Additional Information
Dr. Mark A Weiss MD is a male Internist, has 28 years of experience and practices in Internal Medicine, Medical Oncology, and Hematology.
Where does Dr. Mark A. Weiss practice?
Dr. Mark Weiss has 4 office locations.
Dr. Mark Weiss practices Internal Medicine, Medical Oncology, and Hematology near Philadelphia, PA.
Additional practice locations include: New York, NY.
See Philadelphia Internists, Philadelphia Oncologists, and Philadelphia Hematologists.