; or (ii) direct a covered veteran to receive care or services from certain health care providers instead of other health care providers. (4) In carrying out this section, the Secretary shall not limit any hospital care, medical service, extended care service, or class of hospital care, medical service, or extended care service that are set forth in the Medical Benefits Package of the Department, as modified as determined by the Secretary. (b) Covered veterans For purposes of this section, a covered veteran is any veteran who— (1) (A) is enrolled in the patient enrollment system of the Department established and operated under section 1705 of this title; or (B) is not enrolled in such system but is otherwise entitled to hospital care, a medical service, or an extended care service under subsection (c)(2) of such section; and (2) (A) has been furnished hospital care or medical services under this chapter on at least one occasion during the preceding two-year period