UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.      )

Filed by the Registrant x

Filed by a Party other than the Registrant ¨

Check the appropriate box:

¨ Preliminary Proxy Statement

¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨ Definitive Proxy Statement

x Definitive Additional Materials

¨ Soliciting Material Pursuant to §240.14a-12

Tenet Healthcare Corporation

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x No fee required.

¨ Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.

(1) Title of each class of securities to which the transaction applies:

(2) Aggregate number of securities to which the transaction applies:

(3) Per unit price or other underlying value of the transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):

(4) Proposed maximum aggregate value of the transaction:

(5) Total fee paid:

¨ Fee paid previously with preliminary materials.

¨ Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

(1) Amount Previously Paid:

(2) Form, Schedule or Registration Statement No.:

(3) Filing Party:

(4) Date Filed:

*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on November 3, 2011

TENET HEALTHCARE CORPORATION

Meeting Information Meeting Type:          Annual Meeting For holders as of:    September 7, 2011 Date:    November 3, 2011      Time: 8:00 AM CDT Location:    Fairmont Dallas Hotel                       1717 North Akard Street                       Dallas, Texas 75201

TENET HEALTHCARE CORPORATION 1445 ROSS AVENUE SUITE 1400 DALLAS, TX 75202

You are receiving this communication because you hold shares in the above named company. This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com or easily request a paper copy (see reverse side). We encourage you to access and review all of the important information contained in the proxy materials before voting. See the reverse side of this notice to obtain proxy materials and voting instructions.

M38272-P15182

— Before You Vote —

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

NOTICE AND PROXY STATEMENT            ANNUAL REPORT ON FORM 10-K

How to View Online:

Have the information that is printed in the box marked by the arrow (located on the following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:

                                     1) BY INTERNET:         www.proxyvote.com

                                     2) BY TELEPHONE:     1-800-579-1639

                                     3) BY E-MAIL*:             sendmaterial@proxyvote.com

*  If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before October 20, 2011 to facilitate timely delivery.

— How To Vote —

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box marked by the arrow available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

M38273-P15182

Voting Items
The Board of Directors recommends a vote FOR the following:
1.          Election of Directors  Nominees:	The Board of Directors recommends a vote FOR proposals 2 and 4 and selecting 1 YEAR on proposal 3:
1a.   John Ellis “Jeb” Bush	2.          Proposal to approve, on an advisory basis, the compensation paid to the company’s named executive officers.
1b.  Trevor Fetter
1c.   Brenda J. Gaines  1d.  Karen M. Garrison	3.          Proposal to approve, on an advisory basis, the option of every “1 Year”, “2 Years” or “3 Years” for future advisory votes on executive compensation.
1e.   Edward A. Kangas
1f.   J. Robert Kerrey	4.          Proposal to ratify the selection of Deloitte & Touche LLP as independent registered public accountants for the year ending December 31, 2011.
1g.  Floyd D. Loop, M.D.
1h.  Richard R. Pettingill	PLUS: Such other business as may properly come before the meeting or any adjournment thereof.
1i.   Ronald A. Rittenmeyer
1j.   James A. Unruh

M38274-P15182

M38275-P15182