Backup hospital. A hospital which is otherwise eligible as a CHAMPUS institutional provider and which is fully capable of providing emergency care to a patient who develops complications beyond the scope of services of a given category of CHAMPUS-authorized freestanding institutional provider and which is accessible from the site of the CHAMPUS-authorized freestanding institutional provider within an average transport time acceptable for the types of medical emergencies usually associated with the type of care provided by the freestanding facility.
32 CFR § 199.2
General. In an effort to be as specific as possible as to the word and intent of CHAMPUS, the following definitions have been developed. While many of the definitions are general and some assign meaning to relatively common terms within the health insurance environment, others are applicable only to CHAMPUS; however, they all appear in this part solely for the purpose of the Program. Except when otherwise specified, the definitions in this section apply generally throughout this part.