Final answer:
The term used when a patient is seen by a civilian physician or hospital for services cost-shared by TRICARE is Out-of-Network.
Step-by-step explanation:
The term used when a patient is seen by a civilian physician or hospital for services cost-shared by TRICARE is Out-of-Network which is option b. TRICARE is a health care program for military service members, retirees, and their dependents, and allows them to receive medical services both within and outside of the military health system. When a patient seeks care from a civilian provider, who is not part of the TRICARE network, it is considered an out-of-network service.