Mark L. Sobczak, MD, FACR

Clinical Locations

Primary Location

Fox Chase Cancer Center
333 Cottman Avenue
Philadelphia, PA 19111

Secondary Location

The Prostate Center at King of Prussia
211 South Gulph Road 
Suite 200
King of Prussia, PA 19406 


Associate Professor, Department of Radiation Oncology

Kidney, Bladder, and Prostate Cancer TRDG Member

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 2020
    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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