If you are using the WordPress "Posts" feature to group Patient Stories or Testimonials you can access the posts to edit or add new "stories".
To access published or draft posts, login to your WordPress Admin Dashboard.
On the left side column you can select the "Posts" menu to view all existing articles. Once there look for the Stories associated with the "category" used to group your "Patient Stories". You can then view, edit or add new articles and select the appropriate category representing your "Patient Stories"