EXHIBIT 23(c) Consent of Independent Public Accountants As independent public accountants, we hereby consent to the incorporation by reference in this registration statement of our report dated March 1, 1996, on the consolidated financial statements of Lithotripters, Inc. as of December 31, 1995, 1994 and 1993, and for the years then ended included in Prime Medical Services, Inc.'s Form 8-K/A dated June 4, 1996, and to all references to our firm included in this registration statement. /s/ ARTHUR ANDERSEN LLP Arthur Andersen LLP Raleigh, North Carolina May 4, 1998