Attention Laurel Patients:  The new Laurel office is open. The address is 7140 Contee Road, Suite 3500, Laurel, MD 20707….Attention Lanham/Largo Patients: Our new Largo office is now open and our Lanham location is closed permanently. Largo’s address is 9333 Healthcare Way Suite 4100 Largo, MD 20774.

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Harminder S. Sethi, M.D.

Medical Oncology, Hematology
Board Certification
  • Hematology
  • Medical Oncology
  • American Board of Internal Medicine


Interpreters available for other languages upon request.
Primary Location


6505 Belcrest Rd
Suite 110
Hyattsville, MD 20782


Dr. Sethi is a seasoned Hematologist/ Medical Oncologist with over 18 years of experience. He completed his initial medical education in India, completed his residency training at North Shore University Hospital, NY followed by Oncology/ Hematology fellowship at Medstar Washington Hospital Center. During the fellowship, Dr. Sethi completed Bone Marrow Transplant training in affiliation with the Fred Hutchinson Cancer Center in Seattle, WA, and additional Oncology training with the National Heart, Blood, and Lung Institute. Dr. Sethi has an ardent respect for each patient and develops treatment plans including, targeted therapy and biological therapy based on the most up-to-date national guidelines, designed to treat the unique intricacies of each patient’s illness. He is affiliated with Providence Hospital and Medstar Washington Hospital Center and instituted the core values to which they adhere.

Education & Experience

Medical School
  • Himachal Pradesh University (1991)
  • Long Island Jewish Forest Hills (1996)
  • MedStar Washington Hospital Center (1999)

Practicing Locations


6505 Belcrest Rd
Suite 110
Hyattsville, MD 20782

Washington, DC

1160 Varnum St NE
Suite 318
Washington, DC 20017