Hello and welcome to the forum. So, typically a doctor's office prior to a physical will touch base with you. Sometimes they give you paper work ahead of time as well. A lab blood draw is important to know if you have. So, please give the office a call to know if this is going to be done at your appointment or separately. You may not have a 'slip' but you need to know the proper procedure. Fasting for blood work related to checking for glucose and diabetes warrants fasting for at least 8 hours and most doctors will say 12 hours. And blood work will also look at other things like your lipid profile or possibly metabolic profile as well. https://www.webmd.com/cholesterol-management/fasting-blood-tests#1 But you want to know when the blood draw is so you can plan accordingly. You don't want to fast for no reason to find out your blood draw is a separate time and you don't want to have to do it a second time because you didn't fast.