Distance as a Diagnosis: Catchment Boundaries and the Right to Reach a Transplant

An Invisible Border Drawn in Miles

When policymakers discuss barriers to life-saving care, the language tends to center on insurance status, clinical eligibility, or organ scarcity. Rarely does the conversation acknowledge a more elemental gatekeeper: the physical distance between a failing body and the surgical suite equipped to save it. Yet a growing body of peer-reviewed research indicates that for patients with end-stage organ failure, proximity to a transplant center functions as a parallel determinant of survival — one that operates outside any statute and answers to no explicit rights framework.

This review considers whether that arrangement can be squared with the principles of equal mobility that animate American civil rights jurisprudence. The question is not whether transplant geography matters; the literature establishes that it does. The question is whether a system that requires critically ill people to relocate, commute long distances for repeated evaluation, or forgo listing altogether should be understood as a mobility rights failure — and what policy architecture would remedy it.

What the Waitlist Data Show

Studies of liver and kidney allocation have repeatedly documented a gradient in waitlist mortality that tracks distance. Patients residing in donation service areas far from a transplant program face longer travel times to mandatory pre-transplant appointments, lower rates of waitlist activation, and elevated pre-transplant death rates even after adjusting for illness severity. Rural residents in states such as Montana, the Dakotas, and parts of Appalachia confront round trips of four to eight hours for evaluations that may recur weekly during periods of clinical decline.

The consequence is a form of selection that no allocation committee ever voted on. A patient in Brooklyn and a patient in rural Wyoming with identical Model for End-Stage Liver Disease scores do not face identical odds of survival; they face odds conditioned by the map. Researchers have described this as a two-tier system in which the de facto eligibility criterion is not medical fitness but residential address — a criterion with well-documented correlations to race, income, and employment flexibility.

Mobility Rights Framing

Framing this as a mobility issue requires a modest conceptual extension. Traditional mobility rights analysis concerns state-imposed restraints on movement: license suspensions, passport denial, parole travel zones. Transplant catchment geography operates differently — it does not forbid movement, but it prices and burdens movement at precisely the moment a person is least capable of bearing either. A patient on dialysis three days a week, or with hepatic encephalopathy, faces a practical restraint indistinguishable in effect from a legal one.

The distinction matters for policy. Where the state affirmatively structures access to a life-saving resource around a patient's ability to be physically present, it has arguably assumed an obligation to ensure that the ability to be present is not the operative filter. Courts have recognized analogous logic in contexts ranging from rural school access to the accommodation obligations of public programs: when a benefit is conditioned on presence, the state cannot be indifferent to how presence is achieved.

The Relocation Burden

Current practice implicitly externalizes the mobility problem onto patients. Transplant social workers routinely advise candidates to secure temporary housing within a center's post-operative monitoring radius — often thirty to sixty minutes from the hospital — for a period of weeks or months after surgery. For families of modest means, this requirement can consume savings, force job loss, and separate caregivers from other dependents. Some patients decline listing rather than uproot their households; the literature suggests these declines cluster among lower-income and non-white patients.

No national dataset systematically tracks how many Americans die each year having never been listed because listing was geographically impractical. That absence is itself a policy failure, and one this journal has noted in adjacent contexts: systems that do not measure exclusion can plausibly claim not to see it.

Policy Alternatives on the Table

Three reform trajectories deserve attention from policymakers. The first is allocation reform. Successive revisions to liver allocation have shifted toward broader sharing of organs across larger geographies — the movement from donor service areas to acuity circles being the most cited example — reducing the extent to which a patient's zip code determines organ access. Extending this logic to kidney allocation, where geographic disparities remain pronounced, is a documented priority among health services researchers.

The second is organ transport. Aviation and ground logistics networks already move organs across the country within viability windows. Expanding subsidized transport — particularly for kidneys, which tolerate longer cold ischemia times than livers or hearts — would directly decouple listing decisions from travel capacity.

The third is patient transport and housing support. Reimbursement structures under Medicaid and Medicare currently treat relocation lodging and long-distance medical transport inconsistently across states. A federal standard guaranteeing travel support for waitlist-mandatory appointments would convert an implicit filter into an explicit, funded obligation.

A Research Agenda for Mobility Scholars

The transplant geography literature is robust on correlation but thinner on causal identification and on the lived experience of geographic exclusion. Priority questions include: natural experiment designs exploiting allocation boundary redraws; administrative data linkages connecting listing decisions to transportation infrastructure; and qualitative work documenting relocation burdens among listed candidates. Each would give policymakers the evidentiary basis that rights-based reform requires.

A society that rationed organs openly by wealth or address would provoke immediate constitutional objection. Rationing by distance accomplishes the same result through quieter means. Bringing transplant catchment policy within the frame of mobility rights does not resolve the underlying scarcity of organs — but it insists that the geography of survival be a deliberate choice, subject to justification, rather than an accident of the map.