Health care facility,
Health care facility, with respect to a group health plan, in the context of non-emergency services, is each of the following:
(1) A hospital (as defined in section 1861(e) of the Social Security Act);
(2) A hospital outpatient department;
(3) A critical access hospital (as defined in section 1861(mm)(1) of the Social Security Act); and
(4) An ambulatory surgical center described in section 1833(i)(1)(A) of the Social Security Act.