To amend title 10, United States Code, to establish a demonstration project to evaluate the feasibility of using the Federal Employees Health Benefits program to ensure the availability of adequate health care for Medicare-eligible beneficiaries under the military health care system.

Directs the Secretary of Defense to enter into an agreement with the Office of Personnel Management to conduct a demonstration project under which covered members and beneficiaries under the Civilian Health and Medical Program of the Uniformed Services (CHAMPUS) who are or become entitled to hospital insurance benefits under part A of title XVIII (Medicare) of the Social Security Act will be eligible to enroll in health benefits plans offered through the Federal Employees Health Benefits (FEHB) program. Requires the demonstration project to be conducted in two geographic areas and to last at least two, but not more than three, contract years.

Provides for: (1) management of participation in the project; (2) Government contributions for beneficiary coverage under the FEHB program; and (3) reporting requirements.