421450 Medical, Dental, and Hospital Equipment and Supplies Wholesalers This U.S. industry comprises establishments primarily engaged in wholesaling medical professional equipment, instruments, and supplies (except ophthalmic equipment, instruments and goods used by ophthalmologists, optometrists, and opticians). The data published with NAICS code 421450 include the following SIC industry: 5047 (pt) Medical, dental, and hospital equipment and supplies