FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * PORTER BIGGS C   2. Issuer Name and Ticker or Trading Symbol TENET HEALTHCARE CORP [THC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) 1445 ROSS AVENUE, SUITE 1400 3. Date of Earliest Transaction (Month/Day/Year) 02/25/2012 (Street) DALLAS, TX 75202 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock (1) 02/25/2012   A   32,552 A $ 0 454,471 D   Common Stock 02/25/2012   F   10,227 D $ 5.78 (2) 444,244 D   Common Stock (3) 02/25/2012   A   32,552 A $ 0 476,796 D   Common Stock 02/25/2012   F   10,227 D $ 5.78 (2) 466,569 D   Common Stock               25,000 I By Trust

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

2010 February Performance-Based Restricted Units

(1)

02/25/2012

A

32,552

(1)

(1)

Common Stock

32,552

$ 0

32,552

D

2010 February Restricted Units

(3)

02/25/2012

D

32,552

(3)

(3)

Common Stock

32,552

$ 0

32,552

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PORTER BIGGS C 1445 ROSS AVENUE SUITE 1400 DALLAS, TX 75202			Chief Financial Officer

Signatures

/s/ Paul A. Castanon, Attorney-in-Fact for Biggs C. Porter		02/28/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	(BP1) As previously reported, on February 25, 2010, the reporting person received a grant of 97,656 performance restricted units that were subject to the issuer's attainment of a specified one-year performance metric for the year then-ending December 31, 2010. The performance metric was met; therefore, these restricted units vest ratably on each of the first, second and third anniversaries of the date of grant. The first anniversary of this grant occurred on February 25, 2011, resulting in the vesting and settlement of 32,552 shares of common stock. The second anniversary of this grant occurred on February 25, 2012, resulting in the vesting and settlement of 32,552 shares of common stock, as shown in Table I. The remaining 32,552 performance restricted units, which are scheduled to vest on February 25, 2013, are shown in Table II. Restricted units are settled in shares of the issuer's common stock upon vesting.
(2)	Shares withheld for payment of taxes upon vesting of restricted units in accordance with Rule 16b-3.
(3)	(BP3) As previously reported, on February 25, 2010, the reporting person received a grant of 97,656 restricted units that vest ratably on each of the first, second and third anniversaries of the date of grant. The first anniversary of this grant occurred on February 25, 2011, resulting in the vesting and settlement of 32,552 shares of common stock. The second anniversary of this grant occurred on February 25, 2012, resulting in the vesting and settlement of 32,552 shares of common stock as shown in Table I and Table II. The remaining 32,552 restricted units, as shown in Table II, are scheduled to vest on February 25, 2013. Restricted units are settled in shares of the issuer's common stock upon vesting.

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