What is the problem. You did not explain why you want to go to cancer centre ?. First you should see your own local physician, who will refer to an oncologist, if it is a rare cancer your oncologist will refer you for experimental treatments in a cancer centre, or you seek a second opinion.
Hemonc in cancer ctr. When you go to cancer center- unless mentioned otherwise (i.E radiation center or surgical center) , generally speaking, you will be seen by a hematologist/oncologist or a medical oncologist. In some bigger cancer centers - in addition to medical oncologist, there would be also surgical oncologist and radiation oncologist in the same place.