“…In this paper, to illustrate how to evaluate cardiac surgery at the individual physician level, we explore the performance of CABG surgeons operating in Pennsylvania using historical data from 1994-95 and 2003-4. The research objective is to evaluate the performance and analyze the factors that explain performance using a methodology called Data Envelopment Analysis (Banker et al, 1984;Charnes et al, 1978;Charnes et al, 1994;Chilingerian, 1989;Chilingerian, 1995;Chilingerian & Sherman, 1990;Chilingerian & Sherman, 2011;Cooper et al, 2007;Zhu, 2000;Barros & Aguilera, 2022). To study cardiac surgeon performance, the theory-based mathematic called Data Envelopment Analysis (DEA) is used as a tool for health care policy makers and managers to measure and evaluate the relative performance of clinicians, clinics, and health care organizations.…”