38 U.S.C. § 7305

The Veterans Health Administration shall include the following: (1) The Office of the Under Secretary for Health. (2) A Medical Service. (3) A Dental Service. (4) A Podiatric Service. (5) An Optometric Service. (6) A Nursing Service. (7) A Readjustment Counseling Service. (8) Such other professional and auxiliary services as the Secretary may find to be necessary to carry out the functions of the Administration.