EXHIBIT 23.3 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors Vanguard Health Systems We consent to the use of our report dated June 25, 2004, with respect to the consolidated balance sheets of Saint Vincent Healthcare System, Inc. and subsidiaries as of December 31, 2002 and 2003, and the related consolidated statements of operations, shareholder's equity (deficit), and cash flows for each of the years in the three-year period ended December 31, 2003, included herein and to the reference to our firm as experts under the heading "Independent Registered Public Accounting Firms." Our report refers to a change in Company's accounting for goodwill effective June 1, 2002. /s/ KPMG LLP KPMG LLP Dallas, Texas December 17, 2004