Wadhera RK, Sukul D, Secemsky EA, Shen C, Gurm HS, Boden WE, Yeh RW. Temporal Trends in Unstable Angina Diagnosis Codes for Outpatient Percutaneous Coronary Interventions. JAMA internal medicine. 2019;179(2):259–261. PMID: 30556822
This study examines the appropriate use of percutaneous coronary interventions in New York, Michigan, and Florida using Healthcare Cost and Utilization Project state databases.