Slide 9. Trends in Healthcare Costs and the Concentration of Medical ExpendituresUSA Today Article Screenshot. Image: A screenshot of the USA Today Web site shows the headline and opening paragraphs of the lead article, "5% of patients account for half of health care spending."Previous Slide Contents Next Slide Current as of November 2012 Internet Citation: Slide 9.: Trends in Healthcare Costs and the Concentration of Medical Expenditures. November 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/news/events/nac/2012-07-nac/cohenmeyers/cohenmeyerssl9.html