Discussion
We found that changes in reimbursement associated with the Affordable Care Act could reduce daily revenues for PBT facilities by up to 32% and that facilities focusing primarily on noncomplex cases would suffer the largest relative losses. The incremental revenue gained by treating noncomplex cases in lieu of more time-consuming treatments would be reduced by 41% to 59% after ACO rates. However, at interest rates above 5% or capital costs exceeding $175,000,000, centers would need to treat even larger numbers of noncomplex cases simply to cover daily principal and interest payments. As a result, reimbursement rates after reform would only decrease the maximum percentage of complex patients that 4 gantry facilities were able to treat, by up to 26% of their total census. Assuming that centers are able to operate at full capacity, our models indicate they would have to operate at 18 hours per day simply to cover daily debt payments over a wide range of reasonable debt scenarios.