Effective Sept. 25, 2025, the liver median MELD at transplant (MMaT) values have been updated for each donor hospital nationwide. The MMaT serves as an index value for most liver transplant candidates with MELD exception scores. The updated data table (PDF - 3 MB) of MMaT by donor hospital is available on the Liver and Intestine resource page of the OPTN website. The previous data table (PDF - 3 MB) of MMaT values (in effect through Sept. 24, 2025) is available for comparison.
The median PELD at transplant (MPaT) value will remain at 31, unchanged from the one previously in effect. The MPaT calculation is based on transplants performed nationwide and is not affected by the location of the donor hospital.
Many MELD exception candidates for liver transplants have their exception score based on the MMaT of the donor hospital where the match is being run (for example, MMaT minus 3 points). This means that MELD exception scores will fluctuate based on liver offers from different donor hospitals, and the specific assigned score will not be known until the match is run for an individual donor.
A frequently asked questions (FAQ) document (PDF - 168 KB) is available on the Liver and Intestine resource page of the OPTN website, addressing the MMaT policy. A recorded webinar from June 2022 also features a presentation about the MMaT and MPaT and responses to questions from participants.