The quality of Medicaid and Medicare data obtained from CMS and its contractors: implications for pharmacoepidemiology

摘要

BackgroundAdministrative claims of United States Centers for Medicare and Medicaid Services (CMS) beneficiaries have long been used in non-experimental research. While CMS performs in-house checks of these claims, little is known of their quality for conducting pharmacoepidemiologic research. We performed exploratory analyses of the quality of Medicaid and Medicare data obtained from CMS and its contractors.