Why am i being referred to a cancer institute for anemia nos?

Cancer Centers have hematologists and oncologists. A hematologist would be appropriate to evaluate anemia. You may wish to call your referring doctor to ask if s/he had any thought of cancer. Almost certainly not the case, but it may be reassuring to hear it from your own doctor.

Hematologist/Oncologist are experts at anemia diagnosis and treatment.

When the treatment for anemia required parenteral medications such as intravenous iron or bone marrow stimulation medication, you will be referred to a cancer institute where the hemato-oncologists practice and those drugs are commonly delivered there. Or if the etiology of anemia is undefined, these doctors are also the ones who do the works-up.