FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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 *   Doherty Catherine T. 2. Date of Event Requiring Statement (Month/Day/Year) 05/17/2011 3. Issuer Name and Ticker or Trading Symbol QUEST DIAGNOSTICS INC [DGX] (Last) (First) (Middle) C/O QUEST DIAGNOSTICS INCORPORATED, 3 GIRALDA FARMS 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) SVP, Physician Services Bus. 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) MADISON, NJ 07940 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 56,057 (1) D   Common Stock 3,401 (2) I 401(k)/SDCP

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (Right to Buy)	  (3)	02/15/2013	Common Stock	40,000	$ 52.24	D	Â
Stock Options (Right to Buy)	  (3)	02/12/2014	Common Stock	43,334	$ 52.25	D	Â
Stock Options (Right to Buy)	  (3)	02/19/2014	Common Stock	33,000	$ 40.43	D	Â
Stock Options (Right to Buy)	  (3)	08/16/2014	Common Stock	25,000	$ 53.19	D	Â
Stock Options (Right to Buy)	  (3)	03/04/2015	Common Stock	23,667	$ 47.49	D	Â
Stock Options (Right to Buy)	  (3)	02/11/2019	Common Stock	23,667	$ 51.2	D	Â
Stock Options (Right to Buy)	  (3)	02/10/2020	Common Stock	23,667	$ 55.65	D	Â
Stock Options (Right to Buy)	  (3)	02/15/2021	Common Stock	23,667	$ 56.82	D	Â
Stock Options (Right to Buy)	  (3)	05/16/2021	Common Stock	9,167	$ 57.35	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Doherty Catherine T. C/O QUEST DIAGNOSTICS INCORPORATED 3 GIRALDA FARMS MADISON, NJ 07940	Â	Â	  SVP, Physician Services Bus.	Â

Signatures

/s/ William J. O'Shaughnessy, Jr., Attorney in Fact for Catherine T. Doherty		05/19/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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 amount includes exempt purchases made under the Company's stock purchase plan.
(2)	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 obtained from the plan administrator as of a current date. The number of shares is based on the account balance of the Company stock fund under each Plan (which includes some money market instruments) divided by the market price of the Company stock as of that date.
(3)	Stock options which vest in three equal annual installments beginning on the first anniversary of the date of grant.

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