SIE Sierra Health Svcs

Sierra Health Services, Inc. (NYSE:SIE) announced that, at a special shareholder meeting held today, at which more than a majority of the shareholders entitled to vote were present, more than 99% of the votes cast approved the merger agreement in which UnitedHealth Group (NYSE:UNH) will acquire Sierra. Under the terms of the merger agreement announced on March 12, 2007, Sierra shareholders will receive $43.50 in cash for each Sierra share held. The completion of the transaction remains subject to the receipt of certain regulatory approvals and the satisfaction or waiver of other conditions. Both companies continue to expect the transaction to close by the end of 2007, or sooner. Sierra Health Services, Inc., based in Las Vegas, is a diversified healthcare services company that operates health maintenance organizations, indemnity insurers, preferred provider organizations, prescription drug plans and multi-specialty medical groups. Sierra�s subsidiaries serve over 860,000 people through health benefit plans for employers, government programs and individuals. For more information, visit the Company�s website at www.sierrahealth.com. Statements in this news release that are not historical facts are forward-looking and based on management�s projections, assumptions and estimates; actual results may vary materially. Forward-looking statements are subject to certain risks and uncertainties, which include but are not limited to: 1) potential adverse changes in government regulations, contracts and programs, including the Medicare Advantage program, the Medicare Prescription Drug Plan and any potential reconciliation issues, Medicaid and legislative proposals to eliminate or reduce ERISA pre-emption of state laws that would increase potential managed care litigation exposure; 2) competitive forces that may affect pricing, enrollment, renewals and benefit levels; 3) unpredictable medical costs, malpractice exposure, reinsurance costs, changes in provider contracts and inflation; 4) impact of economic conditions; 5) changes in healthcare reserves; 6) the effects of the termination of the HCA contract; 7) the amount of actual proceeds to be realized from the note receivable related to the sale of the workers� compensation insurance operation; and 8) receipt of certain regulatory approvals and the satisfaction or waiver of other conditions pertaining to the proposed merger with UnitedHealth Group. Further factors concerning financial risks and results may be found in documents filed with the Securities and Exchange Commission and which are incorporated herein by reference. Consequently, all of the forward-looking statements made in this press release are qualified by these cautionary statements, and there can be no assurance that the actual results or developments anticipated by Sierra will be realized or, even if substantially realized, that they will have the expected consequences to, or effects on, Sierra or its business or operations. Sierra assumes no obligation to update publicly any such forward-looking statements, whether as a result of new information, future events or otherwise.