25 U.S.C. § 1644: Grants to and contracts with the Service, Indian tribes, tribal organizations, and urban Indian organizations to facilitate outreach, enrollment, and coverage of Indians under Social Security Act health benefit programs and other health benefits programs

to enroll for benefits under a program established under title XVIII, XIX, or XXI of the Social Security Act [ 42 U.S.C. 1395 et seq., 1396 et seq., 1397aa et seq.] and other health benefits programs; and with respect to such programs for which the charging of premiums and cost sharing is not prohibited under such programs, to pay premiums or cost sharing for coverage for such benefits, which may be based on financial need (as determined by the Indian tribe or tribes or tribal organizations being served based on a schedule of income levels developed or implemented by such tribe, tribes, or tribal organizations). to determine the population of Indians eligible for the benefits described in subsection (a); to educate Indians with respect to the benefits available under the respective programs; to provide transportation for such individual Indians to the appropriate offices for enrollment or applications for such benefits; and to develop and implement methods of improving the participation of Indians in receiving benefits under such programs. The provisions of subsection (a) shall apply with respect to grants and other funding to urban Indian organizations with respect to populations served by such organizations in the same manner they apply to grants and contracts with Indian tribes and tribal organizations with respect to programs on or near reservations. consistent with the requirements imposed by the Secretary under subsection (b); appropriate to urban Indian organizations and urban Indians; and necessary to effect the purposes of this section. The Secretary, acting through the Centers for Medicare & Medicaid Services, shall develop and disseminate best practices that will serve to facilitate cooperation with, and agreements between, States and the Service, Indian tribes, tribal organizations, or urban Indian organizations with respect to the provision of health care items and services to Indians under the programs established under title XVIII, XIX, or XXI of the Social Security Act [ 42 U.S.C. 1395 et seq., 1396 et seq., 1397aa et seq.]. For provisions relating to agreements of the Secretary, acting through the Service, for the collection, preparation, and submission of applications by Indians for assistance under the Medicaid and children’s health insurance programs established under titles XIX and XXI of the Social Security Act [ 42 U.S.C. 1396 et seq., 1397aa et seq.], and benefits under the Medicare program established under title XVIII of such Act [ 42 U.S.C. 1395 et seq.], see subsections (a) and (b) of section 1139 of the Social Security Act [ 42 U.S.C. 1320b–9 ]. The term “premium” includes any enrollment fee or similar charge. The term “cost sharing” includes any deduction, deductible, copayment, coinsurance, or similar charge.