Large geographic variations in Medicare costs have long been documented; however, the size and source of this variation has been the subject of dispute. Casemix adjustment, or controlling for area population health, is critical to developing Medicare geographic cost variation estimates, yet there is a lack of consensus on the ideal casemix control method.
Large geographic variations in Medicare costs have long been documented; however, the size and source of this variation has been the subject of dispute. There are many factors that influence spending per Medicare beneficiary, including, perhaps most importantly, a patient’s health status. Consequently, casemix adjustment, or controlling for area population health, is critical to developing Medicare geographic cost variation estimates.