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.].