I had to get some tests done per doctor’s order. I chose this Quest Diagnostic because of location. The office hours are clearly posted on the office window, although it’s not clearly visible. I often hear people grumbling about no drug tests on Saturdays. It got used to how they care for the customers. There is no receptionist, just another friendly phlebotomist checks on the waiting area once awhile. So, sign in on the clipboard doesn’t matter what, even just to ask a question. It’s located on the 4th floor of a short medical building next to the rear of KPRC Channel 2. This office is right across from the elevator. So it doesn’t matter which way you turn. Tips: — Avoid lunchtime on Mondays — parking lot is packed. There are other businesses in this medical building. — Plan to be here for longer than expected. So, make an appointment online or on the phone. — Public restrooms are on the first floor as you walk in.