This industry comprises establishments primarily engaged in the merchant wholesale distribution of professional medical equipment, instruments, and supplies (except ophthalmic equipment and instruments and goods used by ophthalmologists, optometrists, and opticians). Illustrative Examples: Dental equipment and supplies merchant wholesalers Medical dressings merchant wholesalers Electromedical equipment merchant wholesalers Patient monitoring equipment merchant wholesalers Hospital beds merchant wholesalers Prosthetic appliance and supplies merchant wholesalers Hospital furniture merchant wholesalers Surgical instrument and apparatus merchant wholesalers Medical and dental X-ray m achine merchant wholesalers Cross-References. Establishments primarily engaged in the merchant wholesale distribution of professional equipment, instruments and/or goods sold, prescribed, or used by ophthalmologists, optometrists, and opticians are classified in Industry 423460, Ophthalmic Goods Merchant Wholesalers.