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 * PREVOZNIK MICHAEL E   2. Issuer Name and Ticker or Trading Symbol QUEST DIAGNOSTICS INC [DGX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP & General Counsel (Last) (First) (Middle) C/O QUEST DIAGNOSTICS INCORPORATED, 3 GIRALDA FARMS 3. Date of Earliest Transaction (Month/Day/Year) 02/29/2012 (Street) MADISON, NJ 07940 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 02/29/2012   A   11,324 (2) A $ 0 47,945 D   Common Stock 02/29/2012   F   4,117 (3) D $ 58.24 43,828 D   Common Stock 03/01/2012   S(1)   7,207 D $ 57.3964 (4) 36,621 (5) D   Common Stock               4,370 (6) I 401k/SDCP

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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PREVOZNIK MICHAEL E C/O QUEST DIAGNOSTICS INCORPORATED 3 GIRALDA FARMS MADISON, NJ 07940			SVP & General Counsel

Signatures

/s/ William J. O'Shaughnessy, Jr., Attorney in Fact for Michael E. Prevoznik		03/02/2012
**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)	The sale reported was effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on February 7, 2011.
(2)	Stock issued by Quest Diagnostics Incorporated in settlement of a performance share award dated February 11, 2009, approved in accordance with the requirements of Rule 16b-3(d).
(3)	Disposition of common stock to the issuer solely to cover tax withholding obligations arising from the settlement of said performance share award.
(4)	This transaction was executed in multiple trades at prices ranging from $57.34 to $57.47. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
(5)	The amount includes exempt purchases made under the Company's stock purchase plan.
(6)	These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k) and/or Supplemental Deferred Compensation Plan. The information was obtain from the plan administrator as of a recent date. The number of shares is based on the account balance of the Company stock fund under the plan (which includes some money market instruments) divided by the market price of the Company's stock as of that date.

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