subparagraphs from a health care provider specified in subsection (c) shall be at the election of the veteran. (e) Conditions under which care is authorized to be furnished through non-Department providers (1) (A) The Secretary may furnish hospital care, medical services, or extended care services through a health care provider specified in subsection (c) to a covered veteran served by a medical service line of the Department that the Secretary has determined is not providing care that meets such quality and access standards as the Secretary shall develop. (B) In carrying out subparagraph (A), the Secretary shall— (i) measure access of the medical service line at a facility of the Department when compared with the same medical service line at different Department facilities