@miriam98 - You make a great point about the technical aspect of this kind of work. Nowadays more and more information is stored in electronic form, not in files and drawers like in the old days of clerical work (although you still see that in doctors’ offices).
Therefore part of your requirements may involve prior experience with a certain software application. They may want someone who is proficient with contact management software for example, or someone who has worked with a certain medical data entry program.
It’s actually becoming more difficult, in my opinion, to get a decent position as an operations clerk without some experience with specialized software of some kind, even if it’s only Excel.