As many as 98,000 people die each year as a result of medical error. According to law and economics scholars, the solution to this problem is straightforward: When calibrated correctly, medical malpractice liability will force healthcare providers to internalize the cost of their negligence, incentivizing improvements to patient safety that will reduce medical error. Debate has raged for decades over the coherence of deterrence theory, but little attention has been paid to the erosion of one of its bedrock assumptions: that the procedural mechanism through which claims are to be resolved is litigation. Arbitration has become pervasive in the healthcare context, but its effects on medical malpractice liability’s ability to deter medical error have been largely overlooked by public health and legal scholars. This Note argues that the adoption of arbitration will not, as law and economics scholars assume, improve the medical malpractice regime’s ability to deter error. In addition to drawing on existing law and economics and public health scholarship to advance this descriptive claim, this Note studies the experience of Kaiser Permanente, the nation’s largest integrated healthcare consortium, in using arbitration to resolve medical malpractice disputes with its seven million members in California.