This bill proposes to amend Title XVIII of the Social Security Act, establishing no-cost coverage for PFAS testing under the Medicare program. It defines PFAS testing as a blood test ordered by a physician to determine the concentration of perfluoroalkyl and polyfluoroalkyl substances in a patient's system. A significant provision ensures that, for services furnished on or after January 1, 2028, Medicare will cover 100 percent of the costs associated with these tests. This change eliminates beneficiary cost-sharing for PFAS testing, making it fully accessible to seniors.