Abstract: This essay discusses unlimited insurance subrogation (UIS) as a means of improving the deterrence and compensation results of medical malpractice law. Under UIS, health care insureds could assign their entire potential medical malpractice claims to their first-party commercial and government insurers. UIS should improve deterrence by establishing first-party insurers as plaintiffs to confront liability insurers on the defense side, leading to more effective prosecution of meritorious claims and reducing meritless and unnecessary litigation. UIS should improve compensation outcomes by converting litigation cost- and risk- laden "tort insurance" into cheaper and enhanced first-party insurance. UIS also promises dynamic benefits through further reforms by contract between the first-party and liability insurers that would take charge of system. No UIS-related costs are apparent that would outweigh these benefits.