Maryland Oncology Hematology remains open while making accommodations for the health and safety of our patients. If you believe you have been exposed to COVID-19 or have symptoms of COVID-19 including fever, cough, sore throat or shortness of breath, please call our office before you arrive. Any patient that has traveled out of state, please call before your appointment for travel information and review our travel policy. Our Mt. Airy location is now open and Wheaton patients now call Rockville & Germantown. View more information.


Jun F. Sun, M.D.

Jun Sun, M.D.


Medical Oncology


8926 Woodyard Rd #101 Clinton, MD 20735
Phone: 301-812-3900
Fax: 301-7824132
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8116 Good Luck Rd #100 Lanham, MD 20706
Phone: 301-812-3900
Fax: 301-782-4132
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7704 Matapeake Business Drive, Suite 200
Brandywine, MD 20613
Phone: 301-812-3900
Fax: 301-782-4132
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Jun Sun, M.D.


Carnegie Mellon University

Medical School

State University of New York at Buffalo School of Medicine


Georgetown University Medical Center


Internal Medicine, Georgetown University Medical Center


Hematology & Oncology, Georgetown University’s Lombardi Cancer Center

Board Certification

  • Internal Medicine 
  • Medical Oncology
  • Hematology


Dr. Jun Sun is board certified in internal medicine, medical oncology and hematology. After graduating from Carnegie Mellon University, he earned his medical doctorate from the State University of New York at Buffalo School of Medicine. He then returned to Washington, D.C. to complete his internship and internal medicine residency training at Georgetown University Medical Center. He remained there to complete his hematology and oncology fellowship at Georgetown University’s Lombardi Cancer Center.

Dr. Sun is a member of American Society of Hematology and the American Society of Clinical Oncology. He has published multiple research articles in peer-reviewed journals.