Exhibit 23.1 CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statement Form S-8 (No. 333-29745, No. 333-40393 and No. 333-59795) pertaining to the 1996 Stock Option Plan of DAOU Systems, Inc. of our report dated August 4, 1998 with respect to the supplemental consolidated financial statements of DAOU Systems, Inc. included in its Current Report on Form 8-K dated November 20, 1998 filed with the Securities and Exchange Commission. /s/ ERNST & YOUNG LLP San Diego, California November 19, 1998