Default order answer in an orderset (Chest xray reason pre-selected)

When I build something like a PICC line orderset and there is a Chest Xray order included, I cannot currently default the reason for the Chest Xray in that Orderset. This means that Physicians and staff always have to use the drop down to select "VERIFY PICC LINE PLACEMENT" when thats the only reason you would ever order a Chest Xray from that orderset. This would be helpful in ancillary item orders, and even medication orders for indication (example: ordering vancomycin off of the MRSA orderset, the indication is MRSA)