Early physician spillover responses to the oncology care model.

e19393 Background: As Medicare increasingly seeks to transform beneficiary care through provider reimbursement incentives, there is a possibility that non-beneficiary care will change too. There is limited information on how the Oncology Care Model (OCM) has affected care in this way. This study seeks to analyze the early utilization and cost effects of the OCM on the non-Medicare population. Methods: This was a retrospective analysis of a large physician network comprised of OCM participants and non-participants alike. The data spanned July 1st, 2015 to June 30th, 2017 – one year before and after the launch of the OCM. Several states are represented, and this population includes about 20% of the non-hospital-based community oncology footprint. A difference-in-differences approach was used to compare primary first-year effects on the Medicare population with first-year spillover effects on the Medicare Advantage (MA), private, and Medicaid populations. The utilization and costs of care under management of the practices were evaluated. Effects of the OCM for breast, lung, colon, and prostate cancer among Medicare, MA, private, and Medicaid populations at the physician-by-month lev