Blood Draw Lab 1 at Mass General Brigham Healthcare Center (20 Patriot Place, Foxborough) is open to patients with an open laboratory order from their Mass General Brigham provider. No appointment is necessary, walk-in appointments are available at the Patriot Place blood lab. Walk-in appointments are welcome Monday through Friday from 7:30 am to 5:00 pm and Saturday from 8:00 am - 12:00 pm.