Premier Medical Group Phlebotomy Patient Service Center. 1 Webster Avenue, Suite 301, Poughkeepsie. Monday – Friday: 7:00 am – 3:00 pm. (Webster Ave. Lab is closed 1:00 pm – 1:30 pm each day for lunch) Poughkeepsie. Premier Medical Group Phlebotomy Patient Service Center. 243 North Road, Suite 101A, Poughkeepsie..