COVID-19 UPDATE: All appropriate infection prevention measures have been implemented to prevent exposure to our patients and medical staff. Please call your doctor’s office or health care provider if you think you need to be evaluated. Visit our website for the most up-to-date information on testing, visitation restrictions and illness prevention. Sharp Coronado's Emergency Room is available 24 hours a day and is supported by specially trained medical emergency staff and physicians to ensure that each patient receives the best care possible.