UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report: June 14, 2010

(Date of earliest event reported)

TENET HEALTHCARE CORPORATION

(Exact name of Registrant as specified in its charter)

1445 Ross Avenue, Suite 1400

Dallas, Texas 75202

(Address of principal executive offices, including zip code)

(469) 893-2200

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions:

On June 14, 2010, Tenet Healthcare Corporation (the “Company”) issued a press release announcing that the Company has raised its outlook for 2010. A copy of the press release is attached to this report as Exhibit 99.1 and incorporated herein by reference.

As previously announced, Tenet management will speak at the Goldman Sachs Healthcare Conference on June 15, 2010 at 8:35 a.m. PT. At such time, management will discuss its 2010 outlook revision, as well as strategies for margin expansion. Tenet’s remarks will be available live by webcast and may be accessed through the investor relations section of Tenet’s Web site at www.tenethealth.com.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

The information regarding the Company’s revised 2010 outlook in the press release filed as an exhibit to this report constitutes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. In addition, the information expected to be presented by the Company at the Goldman Sachs Healthcare Conference will include forward-looking statements relating to, among other things, the revised outlook and the Company’s strategies for margin expansion. Such forward-looking statements are based on management’s current expectations and involve known and unknown risks, uncertainties and other factors that may cause the Company’s actual results to be materially different from those expressed or implied by such forward-looking statements. Such factors include, among others, the following: the passage of health care reform legislation and the enactment of additional federal or state health care reform; other changes in federal, state or local laws or regulations affecting the health care industry; general economic and business conditions, both nationally and regionally; demographic changes; changes in, or the failure to comply with, laws and governmental regulations; the ability to enter into managed care provider arrangements on acceptable terms; changes in Medicare and Medicaid payments or reimbursement; liability and other claims asserted against the Company; competition, including the Company’s ability to attract patients to its hospitals; technological and pharmaceutical improvements that increase the cost of providing, or reduce the demand for, health care; changes in business strategy or development plans; the ability to attract and retain qualified personnel, including physicians, nurses and other health care professionals, and the impact on the Company’s labor expenses resulting from a shortage of nurses or other health care professionals; the significant indebtedness of the Company; the Company’s ability to integrate new businesses with its existing operations; the availability and terms of capital to fund the expansion of the Company’s business, including the acquisition of additional facilities; the creditworthiness of counterparties to the Company’s business transactions; adverse fluctuations in interest rates and other risks related to interest rate swaps or any other hedging activities the Company undertakes; the ability to continue to expand and realize earnings contributions from the Company’s Conifer revenue cycle management and patient communication businesses; and its ability to identify and execute on measures designed to save or control costs or streamline operations. Certain additional risks and uncertainties are discussed in the Company’s filings with the Securities and Exchange Commission, including the Company’s annual report on Form 10-K and quarterly reports on Form 10-Q. The Company specifically disclaims any obligation to update any forward-looking statement, whether as a result of changes in underlying factors, new information, future events or otherwise.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: June 14, 2010

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EXHIBIT INDEX

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