LIVER TRANSPLANTATION: Edited by James F. TrotterLiver redistricting what are the upcoming changes in liver allocation in the United States?Bittermann, Theresea; Goldberg, David S.a,b Author Information aDivision of Gastroenterology & Hepatology, University of Pennsylvania bCenter for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, Philadelphia, Pennsylvania, USA Correspondence to Therese Bittermann, MD, Division of Gastroenterology & Hepatology, University of Pennsylvania, Philadelphia, Pennsylvania, USA. Tel: +1 215 349 8222; e-mail: [email protected] Current Opinion in Organ Transplantation: April 2017 - Volume 22 - Issue 2 - p 112-117 doi: 10.1097/MOT.0000000000000383 Buy Metrics Abstract Purpose of review Geographic disparity in liver transplantation is substantial in the United States, and primarily a byproduct of artificially created zones of organ distribution. In 2016, the United Network for Organ Sharing (UNOS) put forward a formal redistricting proposal with the goal of reducing this variability by regrouping the country's 58 donation service areas into eight new districts. This review provides a summary of the redistricting proposal's methodologies, expected results, criticisms and next steps. Recent findings Previous authors have extensively evaluated the limitations of the current organ allocation and distribution system and how inequities in access to liver transplantation occur. However, few have suggested or simulated new ways to solve or improve this process. The 2016 UNOS redistricting proposal constitutes the first formal evaluation of a novel distribution model. This proposal and its shortcomings have led to multiple discussions throughout the transplant community and encouraged further research in this field. Summary This review provides an updated perspective on the key organ distribution issues facing the US transplant community at large, and how UNOS and other experts suggest the problem of geographic disparity in liver transplantation should be solved. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.