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Lung Allocation System

The OPTN lung allocation system (LAS) was revised on February 19, 2015.

The LAS toolkit contains resources and instructional materials for transplant professionals and patients.

LAS Toolkit

Allocation Calculator

Lung allocation system (LAS) calculator


Changes to the lung allocation system


The following webinar recording is available.

  • Revisions to the lung allocation score system: what you need to know

As of June 2, 2016, UNOS Connect is your new resource for educational webinars for transplant professionals. Sign in to register for upcoming events and to access webinar recordings.

About UNOS Connect

  • UNetSM Users: If you have access to UNOS Secure EnterpriseSM systems: UNetSM, WaitlistSM, DonorNet®, TIEDI®, KPDSM and other UNOS-developed transplant applications, your account is already set-up and there is no need for you to register. Access UNOS Connect with your UNetSM username and password. This will allow you full access to the site to view system training recordings, register for policy webinars and view materials.
  • Other Users: The first time you visit UNOS Connect, you will need to complete a brief, online form to register for the site. After that, you will have access to a wide range of UNOS instructional offerings and materials, except system training

Questions and answers about LAS changes (PDF - 94 KB)

Policy & Compliance

OPTN lung policy - policy 10 (PDF - 2.5 MB)

OPTN evaluation plan - policy 10 (PDF - 1.6 MB)