I think I can do this myself. What are the benefits of using a GPO?

We aggregate the purchasing power of 1,600 acute-care hospitals and the largest health systems in the U.S. to generate one best price for all. Unlike other GPOs, there is no further local or regional negotiation needed to receive optimal value on core commodities—resulting in double-digit savings on the exact products from the same vendors you are using today, and returning valuable time to you to concentrate on mission-critical initiatives.