I think the shooting location was a medical office building, not a real hospital. Grady Hospital, whose ambulance I saw in one of the pics, and which is nearby, is a top-rate trauma center. Fort Benning sends people to train there. Great place to get stabilized, then ship out to a better hospital for full recovery.
It is all very confusing. It appears Northside Medical Midtown includes Northside Hospital Cardiovascular Institute-Midtown Atlanta and other medical specialties.