Hemochromatosis Support Group
Hemochromatosis is a hereditary disease characterized by improper processing by the body of dietary iron which causes iron to accumulate in a number of body tissues, eventually causing organ dysfunction. It is the main iron overload disorder. Hemochromatosis is notorious for having symptoms that are often initially misattributed to other diseases.
Going to a hematologist/oncologist works better for me because there is more than one nurse and they have access to smaller needles (for chemotherapy patients) and vacuum bottles to phlebotomize. I've already been through the port and PICC route (which I don't advise).
So it's your call. You might consider a consult to the GI doctor if you find you don't feel comfortable with the hematologist.
I don't have the phleebs there though, I donate at a donation center.