Final answer:
TRICARE for Life members must be enrolled in Medicare, as TRICARE for Life acts as a secondary payer to Medicare. This requirement ensures military veterans who have served in the U.S. Armed Forces can receive comprehensive healthcare coverage.
Step-by-step explanation:
TRICARE for Life members must also be enrolled in Medicare. Medicare is the government-funded health care program that provides health insurance to individuals who are over the age of 65, among others who meet specific disability standards. TRICARE for Life serves as a secondary payer to Medicare, and therefore, enrollment in Medicare Part A and Part B is a requirement for those who wish to receive TRICARE for Life benefits. This program is especially tailored for military veterans who have served in the United States Armed Forces and are eligible for TRICARE, adding an additional layer of healthcare coverage to the services they already receive through the Veterans Health Administration.