In my opinion, as a patient, the Medical Oncologist is actually more involved throughout the entire treatment cycle. For me, the Medical Oncologist works with the Radiation Oncologist to develop the treatment plan that involved chemotherapy coordinated with radiation therapy. My chemotherapy was designed to make the radiation therapy work more effectively. At that point, after the radiation therapy, I am possibly and hopefully done with the Radiation Oncologist but still see the Medical Oncologist for immunotherapy. I imagine either one could oversee the check up and monitoring CT scans. It just seemed strange to me to only have a Radiation Oncologist because I am more involved with my Medical Oncologist. I guess every place can be a little different.