Slide 5. Trends in Healthcare Costs and the Concentration of Medical ExpendituresMedical Provider Component. Targeted Sample:All associated hospitals and associated physicians.Sample of associated office-based physicians.All associated home health agencies.All associated pharmacies.Data Collected:Dates of visit.Diagnosis and procedure codes.Charges (except Rx) and payments.Previous Slide Contents Next Slide Current as of November 2012 Internet Citation: Slide 5. : 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/cohenmeyerssl5.html