Evaluating reduction in medical costs associated with pharmacists' presence in the emergency department using a novel...

The purpose of this study was to evaluate the cost avoidance associated with emergency medicine pharmacist (EMP) presence in the emergency department (ED) using a novel cost avoidance framework.

This single-center, retrospective, observational study examined EMP interventions from November 1, 2021, through March 31, 2022. EMPs prospectively selected up to 10 shifts in which to log interventions during the study period. Interventions were categorized into 25 cost avoidance categories, 10 of which incorporated recently proposed probability variables. All categories were organized into 4 broad cost avoidance domains, including resource utilization, individualization of patient care, adverse drug event prevention, and hands-on care. During the study period, 894 interventions were logged, which accounted for $143,132 in cost avoidance (lower probability value of $124,186, upper probability value of $168,858), with a median cost avoidance per shift of $1,671 (interquartile range, $1,025 to $2,451). On the basis of 240 shifts, the estimated annual total cost avoidance per pharmacist was extrapolated to be $401,040.

While the mean cost avoidance of $161.10 per intervention observed in our study was less than that in prior cost avoidance studies due to the conservative and potentially more realistic estimates used, implementation of this cost avoidance framework still showed substantial cost avoidance associated with EMP presence in the ED.