The Northampton Dental Group, P.C. Share: Dentists Visit Website Request Info 51 Locust Street Suite #2 Northampton, MA 01060 (413) 584-3741 (413) 582-0485 (fax) About Rep Info About A general dentistry practice emphasizing quality & preventive care for the entire family. Whom to Contact Robert Boynton, Jr. D.D.S.