The main purpose of the IMPACT to Save Moms Act is to improve maternity care for pregnant and postpartum individuals who are enrolled in Medicaid and the Children's Health Insurance Program (CHIP). The act aims to establish a demonstration project that allows states to test new payment models for maternity care, with the goal of enhancing health outcomes for mothers and their babies. Key provisions of the act include the creation of a demonstration project that will run from 2027 to 2031.