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.