To amend title 38, United States Code, to improve benefits for veterans exposed to ionizing radiation.

Includes the following diseases or illnesses in the list of diseases presumed to be service-connected, and therefore compensable for purposes of veterans' disability compensation and medical care in the case of exposure to ionizing radiation: bone cancer, colon cancer, nonmalignant thyroid nodular disease, parathyroid cancer, ovarian cancer, brain and central nervous system tumors, unexplained bone marrow failure, and meningioma.

Excludes all officers or employees of the United States from membership on the Veterans' Advisory Committee on Environmental Hazards. (Currently, up to three employees of Federal departments and agencies other than the Departments of Defense and Veterans Affairs are permitted.)