He earned his medical degree from the All India Institute of Medical Sciences in New Delhi, India, where he also completed his internship and a clinical residency in internal medicine. He completed a second internal medicine residency as well as a fellowship in hematology and medical oncology at the Mayo Graduate School of Medicine. Dr Kumar is certified by the American Board of Internal Medicine and has been a Research Associate/Mayo Foundation Scholar at the Dana-Farber Cancer Institute in Boston, Massachusetts. His research focuses on the development of novel drugs and more effective drug combinations for the treatment of myeloma, as well as on the biology of multiple myeloma, particularly the bone marrow microenvironment.