St. Joseph’s Hospital and Northside Hospital are very easy to get to on MARTA as the hospitals are right next to the Medical Center Station on the red line, near I-285 in the north. If you are coming from the airport/downtown/midtown, you must be on a train labeled “North Springs” to reach the Medical Center station. After 7pm you must take the first available northbound train to the Lindbergh Center station, exit the train and wait for a North Springs train there.
Exit the station on to Peachtree Dunwoody Road for Northside Hospital will be on the right and across the street, along with various other medical office buildings (see area map). For St. Joseph’s Hospital, exit the station toward the parking deck (look for signs pointing to Deck Level One). You can go up the decks escalator/elevators to reach the hospital.