This report details the National Institutes of Health (NIH) budget and appropriations process witha focus on FY2024 and FY2025. NIH is the primary federal agency charged with conducting andsupporting medical, health, and behavioral research. It consists of 27 Institutes and Centers (ICs)and the Office of the Director (OD). In addition, the Advanced Research Projects Agency forHealth (ARPA-H), first funded in FY2022, is established as an independent agency housedwithin NIH to advance “high-p