Grey 's Anatomy follows the lives of surgical interns and residents at the fictional Grey Sloan Memorial Hospital ( formerly Seattle Grace Hospital , Season 1-6 , Seattle Grace Mercy West Hospital , Season 6-9 , and then Grey Sloan Memorial Hospital , Season 9-present ) , as they gradually evolve into seasoned doctors , with the help of their competent mentors .
It is a story about surgical doctors in Seattle Grace-Mercy West Hospital ( previously Seattle Grace Hospital ) .