Mark L. Sobczak, MD, FACR

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Why is this doctor not rated?


To ensure the accuracy of our patient satisfaction scores, we require that providers who see patients receive a minimum number of completed patient-submitted surveys before their reviews are listed on their profiles. Star ratings on this site are collected on a rolling basis from the previous 12 months.
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Clinical Locations

Primary Location

Fox Chase Cancer Center
333 Cottman Avenue
Philadelphia, PA 19111

Secondary Location

Fox Chase Cancer Center East Norriton-Hospital Outpatient Center
2701 Dekalb Pike
East Norriton, PA 19401


Associate Professor, Department of Radiation Oncology

Treatment Focus

Intensity Modulated Radiation Therapy; Image Guided Radiation Therapy; Brachytherapy, including HDR, LDR seeds, and PBI; 3-dimensional treatment planning; Clinical research 

Key Awards

Philadelphia Magazine Top Docs 2021
Radiation Oncology

Education and Training

Educational Background

  • Fellow, American College of Radiology (ACR)
  • Resident, Radiation Oncology, Massachusetts General Hospital, Boston, MA 
  • MD, Uniformed Services, University of the Health Sciences, Bethesda, MD, 1987


  • American Board of Radiology
  • Therapeutic Radiology


  • National Comprehensive Cancer Network (NCCN)
    • NCCN Affiliate Forum
  • American College of Radiology
  • American College of Radiology Oncology
  • American Medical Association
  • American Society for Therapeutic Radiology and Oncology
  • Association of Freestanding Radiation Oncology Centers
  • Delaware Medical Society
  • Maryland Medical Society
  • Lower Shore (of Maryland) Medical Society
  • Naval Academy Alumni Association 

Honors & Awards

  • Philadelphia Magazine Top Doctors, 2017, 2019, 2020
  • Fellow-American College of Radiology (FACR); May 19, 2019
  • America's Top Doctors®2017
  • Finalist, Astronaut Mission Specialist, NASA, 1991
  • Distinguished Graduate, Massachusetts General Hospital, 1991
  • Clinical Oncology Fellow, American Cancer Society, 1990-1991
  • Distinguished Graduate, United States Naval Academy, 1977

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