You know, I met a woman just today who had a child born with arterial septal defect and we were comparing GI doctors here! Her son had an extreme case of reflux, as well as the heart defect. I have no idea if they were related or not....
I will say, though, that it is never a good idea to get medical information from the office secretary or the appointment scheduler. Rarely do they have information (and, frankly, if they did, they would have probably violated your privacy). If you need clarification on why a procedure or an appointment needs to be altered, ask to speak to at least the nurse.