Alzheimer's disease and related dementias (ADRD) represent a significant and growing cost to the United States health care system. While the prevalence and cost of ADRD related to Medicare Fee-for-Service beneficiaries is documented in the Center for Medicare and Medicaid Services' Chronic Conditions Warehouse, less is known about the prevalence and cost of ADRD among individuals covered by employer-sponsored insurance or Medicare Advantage plans. On behalf of the Alzheimer's Association, HCCI used its commercial claims dataset to examine the prevalence and costs associated with Alzheimer's Disease and related dementias among these populations during the years 2016 and 2017. A more extensive publication exploring the findings of this analysis is forthcoming; the results are provided in downloadable data tables below, along with a summary of our methods.