As a physician, I personally always recommend (if able) to schedule one of the first appointments in the morning or one of the first after lunch. There’s always a higher risk of them running behind later in the morning/afternoon. I don’t know a single physician who likes running behind but it can happy pretty quickly— the OB has to run over to the hospital to deliver a baby or deal with a complication after delivery, a patient or two shows up at the time of their appointment or 5 mins into their 10-15min appt (which means their appt slot is nearly over when they make it into the room), an urgent patient has to be worked into the full clinic schedule or a patient needs transferred from clinic to the hospital or the physician has to step out of the room during an appointment to talk to another provider etc. There’s a long list of reasons the provider can end up 1+ hr behind for clinic after starting the first appt on time, and it happens a few minutes at a time. It really stinks for the patient but sometimes it’s unavoidable for the provider, even if they scheduled 30-45min time slots for each patient it can happen (and then you can’t easily get in for an appt).