EXHIBIT (23)(A) Consent of Independent Public Accountants As independent public accountants, we hereby consent to the incorporation of our reports included or incorporated by reference in this Form 10-K, into CMS Energy Corporation's previously filed Registration Statement No. 33-55805, 33-60007, 333-27849, 333-37241, 333-27849, 333-32229, 333-45556, 333-51932, 333-52560, 333-58686, 333-73922 and 333-74958. /s/ Arthur Andersen Detroit, Michigan, March 22, 2002.