1 EXHIBIT (23)(a) ARTHUR ANDERSEN 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 Statements No. 33-47629, No. 33-60007, No. 33-61595, No. 33-62573, No. 333-32229, No. 333-60795, No. 333-63229, No. 333-68937 and No. 333-76347. /s/ Arthur Andersen LLP Detroit, Michigan, March 27, 2000.