(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.