Shannon O'Connor, M.D.

Today, Maryland Oncology Hematology is the largest independent Medical Oncology and Hematology group in Maryland with 30 physicians practicing in 9 locations across central Maryland. Dedicated to providing the most advanced cancer care available anywhere in an atmosphere of caring compassion.

Dr. Sen Gupta is an experienced and compassionate physician specializing in women's breast health. She is committed to providing the best care and ensuring the well-being of her patients. She joins the skilled and comprehensive surgical and cancer teams at Maryland Oncology Hematology, Adventist HealthCare's Shady Grove Medical Center, and the Aquilino Cancer Center.

Dr. Mahmood is board certified in internal medicine, medical oncology and hematology. He completed his medical degree at University of Miami Miller School of Medicine, residency at Boston University Medical Center and fellowship at University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center.