Trend in breakdown of total cost of care for medical oncology over time: Learnings from the Oncology Care Model and implications for future oncology value-based care.

69 Background: Tennessee Oncology (TO) is a large, outpatient community oncology practice with over 200 providers and 35 clinical sites of care across Tennessee and northern Georgia. As an Oncology Care Model (OCM) participant, TO received claims data from Medicare during its OCM participation from 2016-2021. TO adopted continuous quality improvement initiatives to succeed in the program. Here we highlight our adoption of biosimilars and implementation of an independent clinical pathway program. Methods: OCM claims data received from Medicare were analyzed to determine total cost of care (TCOC) per the OCM methodology. TCOC subgroup analysis was conducted by percentage of spend over time on therapeutic and supportive care drugs, emergency room utilization, and hospitalizations. Biosimilar adoption and pathway utilization rates were tracked internally. Results: 27,927 OCM episodes were attributed to TO during the study period 2016-2021. During this time frame and as a percentage of TCOC, total drug spending increased from 58% to 71%. Conversely, spending on hospital and emergency room utilization as a percentage of TCOC decreased from 11.6% to 7.9% and 1.4% to 1.0%, respectively.