Common use of Comparator Peer Group Clause in Contracts

Comparator Peer Group. The Comparator Peer Group is comprised of the companies in the Standard & Poors 500 Healthcare Index as of December 31, 2008. • Excluded from the list of companies in the Comparator Peer Group will be those companies reporting a negative EPS in the Baseline Year since calculating CAGR will not be possible for these companies. 2006 Incentive Stock Agreement Appendix B Quest Diagnostics Incorporated “Equity Award Eligibility Policy” Option Eligibility • Unreduced Work Schedule • One of the following salary grades: • Corporate VP or Higher • Salary Grade 53 or Higher • Research & Development - Grade RD6 or Higher • Medical Director - Grade MD2 For employees whose salary is administered outside the standard Quest structure (i.e., MedPlus, International, Clinical Trials Europe), a Quest Diagnostics salary grade has been assigned consistent with the above requirements. This grade is stored within the Company’s Stock Administration System. IMPORTANT: Meeting the criteria for “Option Eligibility” does not guarantee an award. All grants are subject to a separate approval process.

Comparator Peer Group. The Comparator Peer Group is comprised of the companies in the Standard & Poors 500 Healthcare Index as of December 31, 2008. • Excluded from the list of companies in the Comparator Peer Group will be those companies reporting a negative EPS in the Baseline Year since calculating CAGR will not be possible for these companies. 2006 Incentive Stock Agreement Appendix B Quest Diagnostics Incorporated “Equity Award Eligibility Policy” Option Eligibility • Unreduced Work Schedule • One of the following salary grades: • Corporate VP or Higher • Salary Grade 53 or Higher • Research & Development - Grade RD6 or Higher • Medical Director - Grade MD2 For employees whose salary is administered outside the standard Quest structure (i.e., MedPlus, International, Clinical Trials Europe), a Quest Diagnostics salary grade has been assigned consistent with the above requirements. This grade is stored within the Company’s Stock Administration System. IMPORTANT: Meeting the criteria for “Option Eligibility” does not guarantee an award. All grants are subject to a separate approval process.

Comparator Peer Group. The Comparator Peer Group is comprised of the companies in the Standard & Poors 500 Healthcare Index as of December 31, 2008. • Excluded from the list of companies in the Comparator Peer Group will be those companies reporting a negative EPS in the Baseline Year since calculating CAGR will not be possible for these companies. 2006 Incentive Stock Agreement Appendix B Quest Diagnostics Incorporated “Equity Award Eligibility Policy” Option Eligibility • Unreduced Work Schedule • One of the following salary grades: • Corporate VP or Higher • Salary Grade 53 or Higher • Research & Development - Grade RD6 or Higher • Medical Director - Grade MD2 For employees whose salary is administered outside the standard Quest structure (i.e., MedPlus, International, Clinical Trials Europe), a Quest Diagnostics salary grade has been assigned consistent with the above requirements. This grade is stored within the Company’s 's Stock Administration System. IMPORTANT: Meeting the criteria for “Option Eligibility” does not guarantee an award. All grants are subject to a separate approval process.