Final answer:
TRICARE Plus is a program that provides medical care in military facilities for individuals not enrolled in TRICARE Prime or a commercial health maintenance organization.
Step-by-step explanation:
TRICARE Plus is a program for persons eligible for medical care in military facilities and not enrolled in TRICARE Prime or a commercial health maintenance organization. This statement is true. TRICARE Plus offers access to care in military treatment facilities for individuals who are eligible for care in those facilities but are not enrolled in TRICARE Prime or a commercial health maintenance organization (HMO). This program provides an alternative for those who do not wish to enroll in a Prime option but still want to receive care within the military medical system.