Leon Hwang, MD

Leon Hwang

Medical Oncology


Welcome to my Web page. You’ve taken a positive step in improving our communication, which is so vital to your health care. First, you should know that you’ll be treated by top hematology/oncology physicians, as well as the most caring nurses and staff. You’ll be offered a wide range of options for possible treatment, including chemotherapy (intravenous or oral), biologic therapy, targeted therapy, and opportunities to participate in research trials. All of your specialists, from your surgeon to your oncologist to your pharmacist will have access to your labs, records, radiology films, and care plans. We’ll supplement your care with the power of the internet, so you can email your physician and fill prescriptions from home. Please see the links on this page to contact me and for additional resources.

My advice to patients:

Call us with any concerns. Cancer care can be complicated; we can give you answers and reassurance.

Please bring a family member or a good friend to your first visit and to other important meetings with your physician. Having the support of a person you trust can be vital to making our meetings fruitful.

My goal is to give you the longest and best quality of life possible. Please communicate your goals and priorities to me so that I can help you fulfill your goals.

Stay positive. The therapies are so much easier and more effective than they used to be.

Roles and Responsibilities

Oncology Service Chief

Member, Mid-Atlantic and Ohio Institutional Review Boards

Member, Mid-Atlantic Ethics Committee

Principal Investigator, Cooperative Trials Study Unit


Medical Education
Southwestern Medical School,
Dallas, TX

Johns Hopkins Bayview Medical Center,
Baltimore, MD

Johns Hopkins Bayview Medical Center,
Baltimore, MD

Johns Hopkins Hospital,
Baltimore, MD

Board certification
Medical Oncology,
American Board of Internal Medicine




  • Top Doctor, Washingtonian Magazine, 2010, 2012, 2014
  • Super Doctor, Washington Post, 2012, 2013
  • Top Doctor, Washington Consumers’ Checkbook, 2011
  • American Cancer Society Health Care Hero Award, 2010
  • Daily Record Physician Finalist Health Care Heroes, 2010
  • America’s Best Doctors – Consumer Research Council, 2005-present
  • Cancer Research Institute Postdoctoral Fellowship Research Award, 1996-1998
  • Cum Laude, Yale University, 1987

My Staff

We have great staff supporting the oncology department. Our staff at Largo received an award for their service excellence Largo in 2009. Our staff at Shady Grove are consistent a top performer in patient satisfaction surveys.

My Colleagues

Dr. Matilda So, Largo, Permanente oncologist and hospitalist for 20 yrs

Dr. Mahrukh Hussain, Largo and Shady Grove, Permanente oncologist for 7 yrs, from NCI

Dr. Elizabeth Pfaffenroth, Largo, Permanente oncologist for 2 yrs, from NCI

Dr. Piyapong Vongkovit, Shady Grove and Capital Hill, Permanente oncologist for 1 year, joined from private practice in North Carolina

Dr. Pamela Seam, Largo and Capital Hill, just joined our medical group, specializes in oncology and hematologic disorders

Dr. Nitin Verma, Shady Grove, just joined our medical group