The Newton-Wellesley Hospital Blood Draw Lab is open to Mass General Brigham patients with an open laboratory order from their Mass General Brigham provider. No appointment is necessary, walk-in appointments are available. Walk-in appointments are welcome Monday through Friday from 6:00 am to 7:00pm, Saturday from 7:00 am to 2:45 pm, and Sunday from 7:00 am to 1:45 pm. The blood draw lab is open on Columbus Day, Presidents Day, and MLK Day from 7:00 am to 1:45 pm. Closed on all other holidays.