Dr. Mark Fesen completed his undergraduate work at Rutgers University. After serving as a ward clerk at New York Hospital/Cornell Medical Center, he studied molecular pharmacology at Oral Roberts University before returning to Rutgers University to attend medical school. He completed his internal medicine training at Roger Williams General Hospital/Brown University under Dr. Paul Calabresi. Dr. Fesen is a clinical assistant professor at the University of Kansas and is participating in Phase 2 and 3 Cancer Protocols.

Dr. Fesen is board certified by the American Board of Internal Medicine in Medical Oncology as well as Internal Medicine. He specializes in the diagnosis, treatment and management of all cancer types, leukemias, and lymphomas.

Dr. Fesen is a Fellow of the American College of Physicians. He is an Investigator in the National Cooperative Group Clinical Trials. For the past several years, Dr. Fesen has served on a nationwide healthcare advisory committee, the National Physicians' Council for Healthcare Policy, where he is currently vice chair of oncology for the council. Dr. Fesen is also the author of the book “Surviving the Cancer System: An Empowering Guide to Taking Control of Your Care.”