How to sort a column based on specific text in Google Sheet

I have the following:

=sort(filter('CASES LIST'!C:R,('CASES LIST'!Q:Q="admission")+('CASES LIST'!Q:Q="pending")+('CASES LIST'!Q:Q="PCI")),16,true)

but I want to sort in the following sequence:

Pending first
admission second
PCI third