I wouldn't read too much into it. It could be absolutely anything. It could even just be a crappy way of saying "your blood tests are back and we won't give them to you over the phone so make an appt, although there is nothing abnormal about them". I have even had GPs who won't even tell me if the results were back over the phone, and I had to make an appt just for them to say the results still weren't in (seriously!!!)