my doctors office schedules according to what the person calls in about for example when I call in to schedule my med chech every 6 months that is a 15 minute appointment slot, if its time for my anual physical that is an hour time frame. They schedule these time slots from experience on how long it normally takes them to complete the med check questions or the physical exam. But just because my doctors "scheduling center " has scheduled me for X amount of time does not mean I have to use all that time or not use more time. Sometimes Im in the exam room with my doctor 5 minutes other times Ive been in the exam room 2 hours. it just depends on what is going on and what I need to discuss with him that day. My doctor is great he never rushes me or pushes me to go faster or slower we just go with the flow all that matters is everything by the time I leave the exam room be it 5 minutes or two hours later regardless of the scheduling protocal is addressed and take care of.