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EX-99.7 - EX-99.7 - QUEST DIAGNOSTICS INCdgx12312020ex997.htm
EX-32.2 - EX-32.2 - QUEST DIAGNOSTICS INCdgx12312020ex322.htm
EX-32.1 - EX-32.1 - QUEST DIAGNOSTICS INCdgx12312020ex321.htm
EX-31.2 - EX-31.2 - QUEST DIAGNOSTICS INCdgx12312020ex312.htm
EX-31.1 - EX-31.1 - QUEST DIAGNOSTICS INCdgx12312020ex311.htm
EX-23.1 - EX-23.1 - QUEST DIAGNOSTICS INCdgx12312020ex231.htm
EX-10.17 - EX-10.17 - QUEST DIAGNOSTICS INCdgx12312020ex1017.htm
EX-10.15 - EX-10.15 - QUEST DIAGNOSTICS INCdgx12312020exh1015.htm
EX-10.5 - EX-10.5 - QUEST DIAGNOSTICS INCdgx12312020ex105.htm
EX-10.4 - EX-10.4 - QUEST DIAGNOSTICS INCdgx12312020ex104.htm
10-K - 10-K - QUEST DIAGNOSTICS INCdgx-20201231.htm
Exhibit 21.1
Quest Diagnostics Incorporated (DE)1
(Incorporated on December 12, 1990 in Delaware; EIN: 16-1387862)
Subsidiaries, Joint Ventures and Affiliates
    
CompanyRegistered Alternate name
100% Quest Diagnostics Holdings Incorporated (DE)
100% Quest Diagnostics International Holdings Limited (UK)
100% Quest Diagnostics Holdings Ltd. (UK)
100% ExamOne Canada, Inc. (New Brunswick)
100% Quest Diagnostics Brasil Holdings Ltd. (UK)
99.9% Quest Diagnostics HTAS India Private Limited (India) (0.1% Quest Diagnostics International Holdings Limited (UK)
100% Quest Diagnostics of Puerto Rico, Inc. (PR)
100% Quest Diagnostics Ireland Limited (Ireland)
100% Quest Diagnostics (Shanghai) Co., Ltd. (China)
100% Quest Diagnostics Subsidiary Holdings Ltd. (UK)
40% Q Squared Solutions Holdings Limited (UK)
100% Quest Diagnostics Clinical Laboratories, Inc. (DE)
Advanced Toxicology Network
Smithkline Beecham Clinical
   Laboratories
Quest Diagnostics
Solstas Lab Partners Group
Solstas Lab Partners
100% LabOne, LLC (MO)
Quest Diagnostics
LabOne, LLC of Kansas
100% ExamOne World Wide, Inc. (PA)
100% ExamOne LLC (DE)
100% ExamOne World Wide of NJ, Inc. (NJ)
51% DGXWMT JV, LLC (DE)Health Check by Quest Diagnostics
100% Quest HealthConnect, LLC (CA)
100% Quest Diagnostics Health & Wellness, LLC (DE)
100% LabOne of Ohio, Inc. (DE)
Quest Diagnostics
LabOne
51% Diagnostic Laboratory of Oklahoma LLC (OK)
100% Mid America Clinical Laboratories, LLC (IN)
49% Sonora Quest Laboratories LLC (AZ)
70% Quest Diagnostics Domestic Holder LLC (DE)
40% Q Squared Solutions Holdings, LLC (DE)

100% Quest Diagnostics do Brasil Ltda. (Brazil)
100% Quest Diagnostics Incorporated (MD)
100% Diagnostic Reference Services Inc. (MD)
100% Pathology Building Partnership (MD) (gen. ptnrshp.)

1 Registered Alternate Name: QDI Delaware Incorporated
1 Revised: January 1, 2021
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100% Quest Diagnostics India Private Limited (India)

100% Quest Diagnostics Infectious Disease, Inc. (DE)
(30%)  Quest Diagnostics Domestic Holder LLC (DE)

100% Quest Diagnostics International LLC (DE)
100% Quest Diagnostics Investments LLC (DE)
100% Quest Diagnostics LLC (IL)Quest Diagnostics LLC
100% Quest Diagnostics LLC (MA)
Quest Diagnostics LLC
Quest Diagnostics of Connecticut LLC

81.1% Quest Diagnostics Massachusetts LLC (MA)

100% Quest Diagnostics LLC (CT)
100% Quest Diagnostics Mexico Holding Company Trust (Mexico)
100% Quest Diagnostics Mexico, S de RL de CV (Mexico)
100% Quest Diagnostics Terracotta LLC (DE)
100% Quest Diagnostics Nichols Institute (CA)Nichols Institute
100% Quest Diagnostics of Pennsylvania Inc. (DE)
51% Quest Diagnostics Venture LLC (PA)
53.5% Associated Clinical Laboratories of Pennsylvania, L.L.C. (PA)
1% Associated Clinical Laboratories, L.P. (PA)
52.97% Associated Clinical Laboratories, L.P. (PA)
100% Quest Diagnostics Receivables Inc. (DE)
100% Quest Diagnostics TB, LLC (DE)
100 % Quest Diagnostics Ventures LLC (DE)
100% Athena Diagnostics, Inc. (DE)
100% American Medical Laboratories, Incorporated (DE)
100% Quest Diagnostics Nichols Institute, Inc. (VA)
Nichols Institute
100% Quest Diagnostics Incorporated (NV)
Quest Diagnostics Incorporated of Nevada
Quest Diagnostics
100% Blueprint Genetics Oy (Finland)
100% Blueprint Genetics FZ-LLC (UAE)
2 Revised: January 1, 2021
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100% Blueprint Genetics Inc. (DE)
100% Clearpoint Diagnostic Laboratories, LLC (TX)
100% Cleveland HeartLab, Inc. (DE)Cleveland Heartlab Services, Inc.
100% Isabella Street Urban Renewal, LLC (NJ)
100% Med Fusion, LLC (TX)
med fusion
med fusion clin-trials
med fusion clin-labs



100% Nomad Massachusetts, Inc. (MA)
100% Laboratorio de Analisis Biomedicos, S.A. (Mexico)
100% Reprosource Fertility Diagnostics, Inc. (MA)
100% Unilab Corporation (DE)Quest Diagnostics
100% AmeriPath, Inc. (DE)
100% AmeriPath Cincinnati, Inc. (OH)
Richfield Laboratory of Dermatopathology

100% AmeriPath Cleveland, Inc. (OH)
AmeriPath GI Institute
Dermpath Diagnostics
100% AmeriPath Consolidated Labs, Inc. (FL)
100% AmeriPath Florida, LLC (DE)
AmeriPath Central Florida
AmeriPath Northeast Florida
AmeriPath Southwest Florida
Bay Area Dermatopathology
Dermpath Diagnostics
Dermpath Diagnostics Bay Area
Institute for Immunofluorescence
Institute for Podiatric Pathology
100% AmeriPath Hospital Services Florida, LLC (DE)
100% AmeriPath Kentucky, Inc. (KY)
3 Revised: January 1, 2021
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100% AmeriPath Lubbock 5.01(A) Corporation (TX)
Arlington Pathology Associates
Dermpath Diagnostics Texas
North Arlington Pathology
   Associates
Pathology Associates of Texas
100% AmeriPath New York, LLC (DE)
AmeriPath East
AmeriPath Gastrointestinal Diagnostics
AmeriPath Northeast
Dermpath Diagnostics
Dermpath Diagnostics
    NE-Braintree
Ackerman Academy of Dermatopathology
Dermpath Diagnostics New York

100% AmeriPath Texas Inc. (DE)
100% AmeriPath Tucson, Inc. (AZ)AmeriPath Arizona
100% Consolidated DermPath, Inc. (DE)
100% DFW 5.01(a) Corporation (TX)
AmeriPath North Texas
AmeriPath Dallas
AmeriPath DFW 5.01(a)
   Corporation
100% Diagnostic Pathology Services, Inc. (OK)AmeriPath Oklahoma
100% Kailash B. Sharma, M.D., Inc. (GA)
100% Nuclear Medicine and Pathology Associates (GA)
100% Institute for Dermatopathology, Inc. (PA)
AmeriPath Mid Atlantic
Dermpath Diagnostics
The Dermatopathology
   Laboratory
100% Ocmulgee Medical Pathology Association, Inc. (GA)
AmeriPath Georgia Gastrointestinal Diagnostics
Dermpath Diagnostics
100% Specialty Laboratories, Inc. (CA)
Quest Diagnostics Nichols
   Institute of Valencia, Inc.
Additional Entities Consolidated for Accounting Purposes
AmeriPath Indianapolis, PC (IN)    
AmeriPath Indianapolis, PSC
Dermpath Diagnostics
Colorado Pathology Consultants, P.C. (CO)
AmeriPath Colorado
Dermpath Diagnostics
Dermatopathology of Wisconsin, S.C. (WI)AmeriPath Great Lakes
Hoffman, M.D., Associated Pathologists, Chartered (NV)
Associated Pathologists,
   Chartered
AmeriPath Nevada
Kilpatrick Pathology, P.A. (NC)
PhenoPath Laboratories, PLLC (WA)
4 Revised: January 1, 2021
79104.1



5 Revised: January 1, 2021
79104.1