Quest Diagnostics (DGX) 8-K Quest Diagnostics Commences Cash Tender Offer for Up to $250 Million Combined Aggregate Principal Amount of Certain of its Outstanding Notes

Exhibit 12.1

QUEST DIAGNOSTICS INCORPORATED

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(DOLLARS IN MILLIONS, EXCEPT RATIOS)

	Year Ended December 31,
	2014			2013			2012			2011			2010
Income from continuing operations before taxes, equity earnings and net income attributable to non-controlling interests		820			1,323			1,042			820			1,145
Adjustments:
Distributed income from less than 50% owned companies		24			25			25			29			31
Fixed charges		250			237			239			245			219
Earnings from continuing operations before taxes and fixed charges, as adjusted		1,094			1,585			1,306			1,094			1,395
Fixed charges:
Interest expense		170			163			169			173			148
Portion of rent expense which represents interest factor		80			74			70			72			71
Total fixed charges		250			237			239			245			219
Ratio of earnings to fixed charges		4.4	x		6.7	x		5.5	x		4.5	x		6.4	x