I wish I knew whether Patient Appointment Specialists use scrubs or not, but i'd recommend checking the Dress and Decorum policy. It may have something useful. If you have questions, though, the best thing is to ask the manager directly to see what they consider to be appropriate for your work area.

I will attach a copy of the DaD policy they gave me when I was rotating here in Jacksonville, so these guidelines may be more helpful than those of other locations, and there's also this link : https://careerawareness.mayoclinic.org/hubcap/dress-decorum/

Hope it helps!