1. Health Insurance Federal Invisible Risk Sharing Program The Public Health Service Act is amended by adding at the end the following new title: XXXIV Health Insurance Federal Invisible Risk Sharing Program 3401. Establishment of Federal Invisible Risk Sharing Program (a) In general There is established a Federal Invisible Risk Sharing Program (in this section referred to as the Program ), to be administered by the Secretary, acting through the Administrator of the Centers for Medicare & Medicaid Services (in this section referred to as the Administrator ), to provide payments to health insurance issuers with respect to claims for eligible individuals for the purpose of lowering premiums for health insurance coverage offered in the individual market. (b) Funding (1) Appropriations For the purpose of providing funding for the Program there is appropriated, out of any money in the Treasury not otherwise appropriated, $15,000,000,000 for the period beginning on January 1, 2019, and ending on December 31, 2028. Such funds shall be available to the Secretary for such purpose in such amounts and at such times during such period as specified by the Secretary. (2) Additional funding In addition to amounts appropriated under paragraph (1), out of any money in the Treasury not otherwise appropriated, there shall be appropriated to the Secretary for each year (after 2019) during the period specified in paragraph (1), for purposes of carrying out the Program, an amount equal to the amount by which the actual sum of the premium assistance credits calculated for all taxpayers under section 36B(a) of the Internal Revenue Code of 1986 for the previous year was less than the projected sum of the premium assistance credits calculated for all taxpayers under such section for such previous year. Amounts appropriated pursuant to the previous sentence shall remain available until expended. (3) Limitation Amounts appropriated under this subsection are subject to the requirements and limitations under sections 506 and 507 of division