Just like the "existing other" button, but a "referred treatment plan" button - so you don't have to open every. single. procedure. that is referred to a specialist to specify that it was referred. It would automatically show that procedure as $0 in your office.
OR - give us the ability to select multiple procedures and right click to change the referral status (like when you "move to visit #").
Doing this individually is too time consuming when treatment planning multiple extractions and/or implants in a general office.