The Quickie® QX and QXi® are durable, low-maintenance wheelchair frames that are perfect for the person looking for simplicity, longevity, and Quickie's most popular options at the right price. The new Quickie QX has a vertically-adjustable axle plate and a Healthcare Common Procedure Coding System (HCPCS) Code K0004 designation, while the QXi has both vertical and horizontal adjustability and a HCPCS Code K0005 designation.