Registration No. 333-74103

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_______________

POST-EFFECTIVE AMENDMENT NO. 1

TO FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

________________

QUEST DIAGNOSTICS INCORPORATED

(Exact name of Registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)		16-1387862 (I.R.S. Employer Identification Number)
	Three Giralda Farms Madison, New Jersey 07940

(Address of principal executive offices)

QUEST DIAGNOSTICS INCORPORATED SUPPLEMENTAL DEFERRED COMPENSATION PLAN

(Full title of the Plan)

_______________

William J. O’Shaughnessy, Jr.

Quest Diagnostics Incorporated

Three Giralda Farms

Madison, New Jersey 08940

(973) 520-2116

(Name, address and telephone number of agent for service)

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EXPLANATORY NOTE: DEREGISTRATION OF SECURITIES

This Post-Effective Amendment No. 1 to the Registration Statement on Form S-8, Registration No. 333-74103 (the “Registration Statement”), is being filed to deregister certain shares of Quest Diagnostics Incorporated (the “Company”) common stock (the “Shares”) and participation interests that were registered for issuance pursuant to the Quest Diagnostics Incorporated Supplemental Deferred Compensation Plan (the “Plan”). The Registration Statement, which was filed with the Securities and Exchange Commission on March 9, 1999, registered 200,000 Shares and $4,300,000 participation interests issuable pursuant to the Plan. The Registration Statement is hereby amended to deregister all Shares and participation interests that were previously registered and that remain unissued under the Plan.

SIGNATURES

THE REGISTRANT. Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused Post-Effective Amendment No. 1 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Madison, New Jersey on June 23, 2015.

QUEST DIAGNOSTICS INCORPORATED

By: /s/ William J. O'Shaughnessy, Jr.        

Name:William J. O’Shaughnessy, Jr.

Title: Deputy General Counsel and Corporate Secretary

Note: In reliance upon Rule 478 under the U.S. Securities Act of 1933, as amended, no other person is required to sign this Post-Effective Amendment No. 1.

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