We have been using CPT 36561 to code Mediport catheters inserted for chemotherapy administration, and we code the cancer (162.9, 174.9, etc.) as the diagnosis. Novitas, our Medicare carrier, excludes the cancer diagnoses as codes that support medical necessity for that CPT code. In fact, CPT 36561 is addressed only in Novitas LCD for vascular acces for hemodialysis. We know these catheters are used for other purposes as well as dialysis. Are we coding this procedure correctly? Is there another way we can code this to satisfy Novitas?