Most of the time, for adults, a doctor seeing the numerical value of your weight doesn't really matter. It really depends on your condition and which meds are being prescribed. For example, if a patient has congestive heart failure, weight is one of those things you really want to monitor. If the patient is being prescribed vancomycin, it would be best to get the weight as well. But for normal healthy people, it's not something that weighs heavily on a doctor's mind. ;)