Same screen to edit and display

I'm building an infirmary application in which after you log in and select a patient, you are shown their info on one side with a new visit form on the other side .

I want to be able to view patient history when one clicks on visit from the history section circled below.

My question is ,should upon clicking , it populate the visit entry form on the right or open up another form to view the information. For some reason I feel uncomfortable with using the same visual to both enter information and view historical information. What is the recommended practice for such a case