    <SEC-DOCUMENT>0000930413-24-000979-index.html : 20240325
    <SEC-HEADER>0000930413-24-000979.hdr.sgml : 20240325
    <ACCEPTANCE-DATETIME>20240325170706
    ACCESSION NUMBER:		0000930413-24-000979
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		49
    CONFORMED PERIOD OF REPORT:	20240516
    FILED AS OF DATE:		20240325
    DATE AS OF CHANGE:		20240325

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			QUEST DIAGNOSTICS INC
    		CENTRAL INDEX KEY:			0001022079
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
    		ORGANIZATION NAME:           	08 Industrial Applications and Services
    		IRS NUMBER:				161387862
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12215
    		FILM NUMBER:		24780060

    	BUSINESS ADDRESS:
    		STREET 1:		500 PLAZA DRIVE
    		CITY:			SECAUCUS
    		STATE:			NJ
    		ZIP:			07094
    		BUSINESS PHONE:		9735202700

    	MAIL ADDRESS:
    		STREET 1:		500 PLAZA DRIVE
    		CITY:			SECAUCUS
    		STATE:			NJ
    		ZIP:			07094

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CORNING CLINICAL LABORATORIES INC
    		DATE OF NAME CHANGE:	19960903
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>PRE 14A
    <SEQUENCE>1
    <FILENAME>c108438_pre14a-ixbrl.htm
    <TEXT>
    Document 1 - file: c108438_pre14a-ixbrl.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>x5_c108438x1x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: x5_c108438x1x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>x5_c108438x2x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: x5_c108438x2x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>x5_c108438x3x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: x5_c108438x3x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>x5_c108438x3x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: x5_c108438x3x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>footer.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: footer.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>x5_c108438x10x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: x5_c108438x10x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>x5_c108438x10x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: x5_c108438x10x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>x5_c108438x11x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: x5_c108438x11x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>x5_c108438x11x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: x5_c108438x11x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>x5_c108438x12x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: x5_c108438x12x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>x5_c108438x12x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: x5_c108438x12x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>x5_c108438x13x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: x5_c108438x13x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>x5_c108438x13x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: x5_c108438x13x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>x5_c108438x14x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: x5_c108438x14x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>x5_c108438x14x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: x5_c108438x14x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>tick.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: tick.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>x5_c108438x19x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: x5_c108438x19x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>x5_c108438x19x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: x5_c108438x19x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>x5_c108438x20x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: x5_c108438x20x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>x5_c108438x20x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: x5_c108438x20x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>x5_c108438x32x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: x5_c108438x32x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>x5_c108438x37x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: x5_c108438x37x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>x5_c108438x37x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: x5_c108438x37x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>cross.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: cross.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>x5_c108438x67x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: x5_c108438x67x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>x5_c108438x68x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: x5_c108438x68x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>x5_c108438x68x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: x5_c108438x68x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>x5_c108438x69x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: x5_c108438x69x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>x5_c108438x70x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: x5_c108438x70x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>x5_c108438x75x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 31 - file: x5_c108438x75x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>x5_c108438x76x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 32 - file: x5_c108438x76x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>x5_c108438x91x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 33 - file: x5_c108438x91x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>x7_c108438x1x1.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 34 - file: x7_c108438x1x1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>x7_c108438x1x2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 35 - file: x7_c108438x1x2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>36
    <FILENAME>dgx-20240516.xsd
    <TEXT>
    Document 36 - file: dgx-20240516.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>37
    <FILENAME>dgx-20240516_def.xml
    <TEXT>
    Document 37 - file: dgx-20240516_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>38
    <FILENAME>dgx-20240516_lab.xml
    <TEXT>
    Document 38 - file: dgx-20240516_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>39
    <FILENAME>dgx-20240516_pre.xml
    <TEXT>
    Document 39 - file: dgx-20240516_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>41
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 41 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>42
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 42 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>43
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 43 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>44
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 44 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>45
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 45 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>47
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: FilingSummary.html

    Document 47 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>49
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 49 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>50
    <FILENAME>0000930413-24-000979-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 50 - file: 0000930413-24-000979-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>52
    <FILENAME>c108438_pre14a-ixbrl_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 52 - file: c108438_pre14a-ixbrl_htm.html

    Document 52 - RAW XML: c108438_pre14a-ixbrl_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>