Vanguard Health Systems To Report Third Quarter Fiscal 2012 Results On April 30, 2012

Vanguard Health Systems, Inc. (NYSE: VHS) (the “Company”) plans to announce results for its third fiscal quarter after the market closes on Monday, April 30, 2012.

The Company will host a conference call on May 1, 2012 at 11:00 a.m. Eastern time for senior management to discuss the Company’s financial and operating results. A live broadcast of this conference call can be found on the Company’s website at http://investor.vanguardhealth.com or www.earnings.com. To listen to the live call, please go to the website at least 15 minutes prior to the call to register, download, and install any necessary audio software. The online replay will follow shortly after the conclusion of the call and be available for 90 days.

The Company owns and operates 28 acute care and specialty hospitals and complementary facilities and services in metropolitan Chicago, Illinois; metropolitan Phoenix, Arizona; metropolitan Detroit, Michigan; San Antonio, Texas; Harlingen and Brownsville, Texas; and Worcester and metropolitan Boston, Massachusetts. The Company’s strategy is to develop locally branded, comprehensive healthcare delivery networks in urban markets.

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