Hospitals have always said there's nothing they can do to change how people behave once they leave the hopsital. But starting this October that excuse won't wash any more. As part of the new health care law, hospitals will face hefty fines for allowing too many readmissions. At University of Pennsylvania Hospital, Dr. Shreya Kangovi launched a program that focuses on the five poorest zip codes in Philadelphia—responsible for 85 percent of readmissions in the city.