Appending Limited Clinical Data to an Administrative Database for Acute Myocardial Infarction Patients

Background: Hospitals’ risk-standardized mortality rates and outlier status (significantly higher/lower rates) are reported by the Centers for Medicare and Medicaid Services (CMS) for acute myocardial infarction (AMI) patients using Medicare claims data. New York now has AMI claims data with blood pressure and heart rate added. Objective: The objective of this study was to see whether the appended database yields different hospital assessments...