In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Where are the facilities that do not have an Oklahoma City zip code?, Context: Oklahoma City and the surrounding metropolitan area are home to a number of health care facilities and specialty hospitals. In Oklahoma City's MidTown district near downtown resides the state's oldest and largest single site hospital, St. Anthony Hospital and Physicians Medical Center.
the surrounding metropolitan area