For decades, hospitals have been defined by the number of beds they have. But, if the Mount Sinai Hospital System (MSHS) and its CEO, Dr. Kenneth L. Davis, are correct, in the era following the implementation of the Affordable Care Act, hospitals will instead be defined by the number of patients they treat. By refocusing from a treat-and-admit inpatient mindset to a treat-and-release ambulatory-care platform, MSHS is aiming to keep patients out of hospitals, but until recently it didn’t have the appropriate venue to fully embrace its forward-thinking perspective.