To amend title 10, United States Code, to expand the National Mail Order Pharmacy Program of the Department of Defense to include covered beneficiaries under the military health care system who are also entitled to Medicare.

Directs the Secretary of Defense to ensure that any program to make prescription pharmaceuticals available by mail to covered beneficiaries under the Civilian Health and Medical Program of the Uniformed Services (CHAMPUS) does not exclude covered beneficiaries who are also entitled to hospital insurance benefits under part A of of title XVIII (Medicare) of the Social Security Act.