Final answer:
TRICARE is the primary payer when a beneficiary's health care services are covered by Medicare, TRICARE, and OHI.
Step-by-step explanation:
When a beneficiary's health care services are covered by Medicare, TRICARE, and his or her OHI, TRICARE is the primary payer.
TRICARE is a health insurance program for military personnel and their dependents. It acts as the primary payer when the beneficiary has multiple health insurance plans.
For example, if a beneficiary has health care services covered by Medicare, TRICARE, and his or her OHI (Other Health Insurance), TRICARE will be the first to pay for the services before Medicare and OHI contribute.