Sierra Health Services Inc. Announces Appearance at SG Cowen 25th Annual Healthcare Conference.

LAS VEGAS -- Sierra Health Services Inc. (NYSE: SIE) today announced that members of its senior management are currently scheduled to appear at the SG Cowen 25th Annual Healthcare Conference in Boston on Tuesday, March 15, 2005.

Sierra's presentation is scheduled to begin at approximately 10:30 a.m. Eastern Time. Investors, analysts and the general public are invited to listen to the live presentation free over the Internet by clicking on the Investor Relations link at www.sierrahealth.com.

Anyone listening to Sierra management presentations will be presumed to have read Sierra's Annual Report on Form 10-K for the year ended Dec. 31, 2003, and Quarterly Reports on Form 10-Q for the periods ended March 31, 2004, June 30, 2004, and Sept. 30, 2004. Additionally, an archive of Sierra's fourth quarter, 2004 earnings call, originally broadcast on Feb. 1, 2005 is available on the investor page of Sierra's Web site. Listeners should review cautionary statements under "Management's Discussion and Analysis of Financial Condition and Results of Operations."

Sierra Health Services Inc., based in Las Vegas, is a diversified healthcare services company that operates health maintenance organizations, indemnity insurers, preferred provider organizations and multi-specialty medical groups. Sierra's subsidiaries serve more than 560,000 people through health benefit plans for employers, government programs and individuals. For more information, visit the company's Web site at www.sierrahealth.com.