Make an appointment for sure, but you'll still need to block off half your day. Let's start with calling in to make an appointment, or even to just ask a question. You WILL be on hold for 20+ minutes. Once your appointment rolls around, plan to wait at least 30 minutes in the waiting room, and that's conservative. They will freely tell you they are super behind, but only after you have already paid for your tests. The techs are nice, therefore one star, but that doesn't make up for the terrible keeping to the schedule. This place is disrespectful of patients' time.