Filtered Value list with a single condition

Hi! Sorry a bit new to this still, but I have one table which contains several variables: DateOfConsult and ConsultType (InPatient or OutPatient). I have a layout for data entry in Form View and second layout in a List View. In the List View, I wanted to create a dropdown menu showing the DateOfConsult and the list will show all the people who consulted for that day. For the value list I have two objectives: 1. To show only the dates with OutPatient Consults. 2. To sort value list with the dates in descending order. 

Hope someone can help! Thank you!