This study assess the strengths and limitations of administrative and claims data as person-level cost data for health care research.  The author concludes that administrative data are an essential source for financial burden of illness studies; however, cost estimates can vary substantially by specific measures across data sources.  The author also notes that, while administrative data are available for large populations, include desired details, and can often be tracked longitudinally, they are also limited by numerous factors including generalizability and access.   

Riley, G. F. (2009). Administrative and claims records as sources of health care cost data. Medical Care, 47(7 Suppl 1): S51-5. DOI: 10.1097/MLR.0b013e31819c95aa. http://www.find-health-articles.com/rec_pub_19536019-administrative-claims-records-sources-health-care-cost-data.htm

Author: Gerald F. Riley