To amend title 10, United States Code, to permit covered beneficiaries under the military health care system who are also entitled to medicare to enroll in the Federal Employees Health Benefits program.

Amends Federal provisions concerning the Civilian Health and Medical Program of the Uniformed Services (CHAMPUS) to direct the Secretary of Defense to enter into an agreement with the Office of Personnel Management (OPM) under which covered CHAMPUS beneficiaries who are also entitled to hospital insurance benefits under Part A of title XVIII (Medicare) of the Social Security Act will be permitted to enroll in a health benefits plan offered through the Federal Employees Health Benefits program in lieu of receiving care under CHAMPUS or the TRICARE program. Outlines provisions concerning: (1) required contributions for such coverage; and (2) the management of participants in the plan. Requires the Secretary and the OPM Director to report annually to the Congress describing the provision of health care services to covered beneficiaries under the plan during the preceding fiscal year.