TRICARE For Life is a health care program for military retirees and their eligible family members. It acts as a secondary insurance to Medicare, covering costs that Medicare does not, such as copayments and deductibles. This program is available to those who are 65 years or older and have both Medicare Part A and Part B. To enroll in TRICARE For Life, beneficiaries must be registered in the Defense Enrollment Eligibility Reporting System (DEERS). The program provides access to a wide network of providers and ensures that eligible individuals receive comprehensive health care services without significant out-of-pocket expenses.