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Contact Us Contact us Contact the Department of Laboratory Medicine at 617-355-6353. Sites and hours Phlebotomy2 Brookline Place: 8 a.m. to 12:30 p.m. and 1:30 to 5 p.m. weekdaysBoston: 300 Longwood: 7 a.m. to 8 p.m. weekdaysBoston: 333 Longwood: 9 a.m. to 5 p.m. weekdaysLexington: 7 a.m. to 5 p.m. weekdaysMEHC: 8:30 a.m. to 6 p.m. weekdays (extended hours on Thursdays until 7 p.m.)Needham (opens Jan. 21, 2026): 8 a.m. to 5 p.m. weekdaysNorth Dartmouth: 8 a.m. to 12:30 p.m. and 1:30 to 5 p.m. weekdaysPeabody: 8 a.m. to 5 p.m. weekdaysWaltham: 7:30 a.m. to 6 p.m. weekdays and 8 a.m. to 2 p.m. SaturdaysWeymouth: 7 a.m. to 5 p.m. weekdaysBlood Donor CenterSunday: 7:30 a.m. to 3 p.m.Monday: CLOSEDTuesday: 9 a.m. to 6:30 p.m.Wednesday: 9 a.m. to 6:30 p.m.Thursday: 9 a.m. to 6:30 p.m.Friday: 7 a.m. to 4:30 p.m.Saturday: 7:30 a.m. to 3 p.m.