Needham Gastroenterology Associates 464 Hillside Avenue Suite 201 Needham, MA 02494. BID Needham Endoscopy Unit 148 Chestnut Street Needham, MA 02492. Office: M-F, 9:00 AM - 5:00 PM Endoscopy Unit: M-F, 7:00 AM - 4:30 PM. Phone (781) 444-6460.