Nearly Half of Kidney Transplant Candidates Never Start the Process: What’s Blocking Your Path to a New Kidney?

New York City, MMN Correspondent: Imagine being told you need a kidney transplant to survive, but never even getting the chance to begin the journey. That’s the reality for nearly half of Americans with kidney failure who are referred for a transplant. A groundbreaking national study, analyzing data from over 720,000 patients across the United States, reveals a startling gap in access to life-saving care long before anyone reaches the official waitlist. Only 19% of those referred actually complete the full evaluation and get listed. This isn’t just about organ shortages. It’s about who gets a fair shot at a healthier future.

The research, led by NYU Langone Health and published in the Journal of the American Society of Nephrology, is the most comprehensive look yet at where people drop out of the kidney transplant journey. Patients typically get referred after being diagnosed with end-stage renal disease (ESRD), when kidneys lose about 90% of their function. Dialysis can keep you alive, but it’s not a cure. A successful kidney transplant offers a dramatically better quality of life, longer survival, and lower healthcare costs compared to lifelong dialysis. So why do so many people never even start the evaluation?

The study tracked patients through four stages: referral, evaluation, waitlist placement, and actual transplant. At every step, significant numbers fell away. The most eye-opening finding? 48% of patients never initiated the evaluation process. That means they never underwent the medical tests needed to determine eligibility. The problem isn’t donor shortages or surgical capacity. It’s structural and social barriers that stop people before they can even begin.

Several factors strongly predicted whether a patient would move forward. Unmarried individuals, those with severe obesity, people living in rural areas, older adults, Spanish speakers, and those with lower incomes were all significantly less likely to complete the evaluation. Geographic disparities were especially stark. Patients at smaller transplant centers or those in the Southern United States faced greater hurdles. These regions often have fewer transplant programs, limited resources, and higher rates of social vulnerability like poverty, housing instability, and lack of reliable transportation.

The evaluation itself can feel like a full-time job. After referral, patients must undergo a battery of tests: blood work, imaging scans, cancer screenings, psychological evaluations, and cardiovascular assessments. These appointments can stretch over months while patients continue regular dialysis. For many, this means juggling multiple doctor visits, time off work, and financial strain all while managing a debilitating illness. The burden is especially heavy for those without strong social support. Unmarried patients, for example, may struggle to arrange transportation or find someone to accompany them to appointments, increasing the likelihood of missed visits and dropped referrals.

Smaller transplant centers, which serve more rural or underserved populations, may also contribute to the bottleneck. With fewer staff, limited funding, and lower transplant volumes, these centers may adopt stricter eligibility criteria or offer fewer slots, making it harder for candidates to gain approval. In contrast, larger urban centers with more robust infrastructure and higher transplant output tend to see better progression rates through the pipeline.

Researchers point out that attention has traditionally focused on patients already on the waitlist how long they wait, how organs are allocated, and post-transplant outcomes. But this study shifts the spotlight to what happens earlier: the critical phase between referral and waitlist placement. “Our findings suggest that a substantial proportion of people who need a new kidney fall out of the process long before they reach the waitlist, let alone make it to the operating room,” said Dr. Conor Donnelly, lead author and resident at NYU Grossman School of Medicine. “Which transplant center you go to, where you live, and even whether you are married all appear to influence your chances.”

To conduct the study, researchers analyzed electronic health records from Epic Cosmos, a database containing over 300 million patient records across more than 1,850 hospitals including one-third of U.S. transplant centers. The dataset covered adults referred for kidney transplantation between 2014 and 2025, allowing for a longitudinal view of patient trajectories. Using advanced statistical modeling, the team isolated the impact of demographic, socioeconomic, geographic, and clinical variables on progression through each stage.

The implications go beyond individual patient outcomes. If only 19% of referred patients ever get listed, the potential for saving lives and reducing the burden on the healthcare system is severely underutilized. Each year, thousands of Americans die while waiting for a kidney transplant. Meanwhile, millions remain eligible but invisible in the system due to systemic inequities.

Experts stress that solutions must begin with improving access to early education and support. Providing patients with clear, culturally competent guidance about the transplant process, helping them navigate appointments, and offering transportation assistance could dramatically improve retention. Some transplant centers have begun piloting navigator programs where social workers or patient advocates guide candidates through the evaluation steps. These initiatives show promise and should be scaled nationwide.

The study’s co-senior authors, Dr. Allan B. Massie and Dr. Michal A. Mankowski, both of NYU Grossman School of Medicine, called for broader policy changes. They advocate for standardized evaluation protocols across centers, increased funding for rural transplant programs, and integration of social determinants of health into eligibility assessments. Future research will apply similar methods to other organ transplants such as heart, liver, and lung to uncover whether similar patterns exist.

As the demand for organ transplants continues to grow, understanding and addressing the hidden barriers to entry is no longer optional. It’s essential. The goal isn’t just to increase the number of transplants, but to ensure that every eligible patient has a fair chance to begin the journey toward a healthier future. By fixing the system before the waitlist begins, the nation can move closer to a reality where no one is left behind simply because of where they live, who they are, or how much they earn.