CMS has posted the Medicare Evidence Development & Coverage Advisory Committee (MedCAC) Medicare Evidentiary Priorities list, which lists research topics on clinical practice for which there are significant knowledge gaps. CMS encourages researchers to consider these research priorities when designing studies for items or services that have a direct impact on the health of the elderly. CMS is working with the Agency for Healthcare Research and Quality (AHRQ) to develop a process for future revisions to the priority list. CMS is accepting comments on both the Medicare Evidentiary Priorities List and a process for revising the list, although no comment deadline is provided.