A letter report issued by the Government Accountability Office with an abstract that begins "In fiscal year 2010, the Department of Veterans Affairs' (VA) Veterans Health Administration (VHA) billed veterans millions of medical copayment charges totaling more than $1 billon. Witnesses at a 2009 Subcommittee on Health, House Committee on Veterans' Affairs, hearing raised concerns about inappropriate copayment charges, including some associated with veterans' service-connected conditions. As a result, members of the Subcommittee asked GAO to review (1) VHA copayment charge accuracy, including error rates and related causes, and (2) VHA efforts to monitor copayment charge accuracy. To assess the accuracy of VHA's billed copayment charges, GAO evaluated samples of fiscal year 2010 billed and unbilled medical services to determine copayment error rates and related causes. GAO also reviewed VHA practices related to monitoring the accuracy of copayment charges.."