((a)) The Secretary may contract for the delivery of health care to which covered beneficiaries are entitled under chapter 55 of title 10. The Secretary may enter into a contract under this section with any of the following:
((1)) Health maintenance organizations.
((2)) Preferred provider organizations.
((3)) Individual providers, individual medical facilities, or insurers.
((4)) Consortiums of these providers, facilities, or insurers.
((b)) A contract entered into under this section may provide for the delivery of—
((1)) selected health care services;
((2)) total health care services for selected covered beneficiaries; or
((3)) total health care services for all covered beneficiaries who reside in a geographic area designated by the Secretary.
((c)) The Secretary may prescribe a premium, deductible, copayment, or other change for health care provided under this section.