A perfect example of social determinants of health is highlighted in the idea that life expectancy can vary by zipcode. This article succinctly describes why life expectancy can depend so much on area of residence. It highlights an almost 20 year difference in New Orleans from one zipcode to the next. This reviews all of the social elements that work together to contribute to either higher or lower life expectancies and is truly one of the best ways to understanding social determinants of health.