This document is a notice and proxy statement for the 2007 Annual Meeting of Shareholders of Quest Diagnostics Incorporated to be held on May 8, 2007 at 10:30am EDT at the Waldorf-Astoria hotel in New York City. It invites shareholders to attend and vote on matters including the election of directors and ratification of the independent auditor. It provides details on voting procedures and outlines the company's corporate governance policies and executive compensation practices.