EX-21.1 3 dgx12312018ex211.htm EXHIBIT 21.1
Exhibit 21.1
Quest Diagnostics Incorporated (DE)
(Incorporated on December 12, 1990 in Delaware; FEIN No. 16-1387862)
Subsidiaries, Joint Ventures and Affiliates

Company | Registered Alternate Name
100% Quest Diagnostics Holdings Incorporated (DE) |
| 100% Quest Diagnostics International Holding Limited (UK) |
|  | 100% Quest Diagnostics Holdings Ltd. (UK) |
|  | 100% Exam One Canada, Inc. (New Brunswick) |
|  | 100% Quest Diagnostics Brasil Holdings Ltd. (UK) |
|  | 100% Quest Diagnostics Testes Forenses do Brasil Ltda. (Brazil) |
|  | 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 do Brasil Ltda. (Brazil) |
|  | 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
| 100% Lab One, LLC (MO) | LabOne, Inc. of Kansas Quest Diagnostics
|  | 100% Exam One 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% Mobile Medical Examination Services, LLC (CA) | MedXM
| 100% Quest Diagnostics Health & Wellness LLC (DE) |
| 100% Lab One of Ohio, Inc. (DE) | Quest Diagnostics LabOne
| 44% Mid America Clinical Laboratories (IN) |
| 51% Diagnostic Laboratory of Oklahoma LLC (OK) |
| 49% Sonora Quest Laboratories LLC (AZ) |
| 70% Quest Diagnostics Domestic Holder LLC (DE) |
|  | 40% Q Squared Solutions Holdings, LLC (DE) |
100% Quest Diagnostics Incorporated (MD) |
| 100% Diagnostic Reference Services Inc. (MD) |
| 100% Pathology Building Partnership (MD) (gen. ptnrshp.) |
100% Quest Diagnostics Incorporated (MI) | Quest Diagnostics Incorporated
100% Quest Diagnostics India Private Limited (India) |
100% Quest Diagnostics Infectious Disease, Inc. (DE) |
| (30%) Quest Diagnostics Domestic Holder LLC (DE) |

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Exhibit 21.1

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
100% Clearpoint Diagnostic Laboratories, LLC (TN) | Clearpoint Diagnostic Laboratories
100% Cleveland HeartLab, Inc. (DE) | Cleveland HeartLab Services, Inc.
100% Isabella Street Urban Renewal, LLC (NJ) |
100% Med Fusion, LLC (TN) | 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) |

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Exhibit 21.1

100% Spectrum Holding Company, Inc. (DE) |
| 100% Solstas Lab Partners Group, LLC (NC) |
|  | 100% Solstas Lab Partners, LLC (VA) |
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) |
| 100% AmeriPath Lubbock 5.01(a) Corporation (TX) | AmeriPath Southwest 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 PAT 5.01(a) Corporation (TX) |
| 100% AmeriPath Texas Inc. (DE) |
| 100% AmeriPath Tucson, Inc. (AZ) | AmeriPath Arizona
| 100% Arlington Pathology Association 5.01(a) Corporation (TX) |
| 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% NAPA 5.01(a) Corporation (TX) | Dermpath Diagnostics Texas

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Exhibit 21.1

| 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.
| 100% TXAR 5.01(a) Corporation (TX) |
Additional Entities Consolidated for Accounting Purposes |
A. Bernard Ackerman, M.D. Dermatopathology, PC (NY) |
AmeriPath Indianapolis, P.C. (IN) | AmeriPath Indianapolis, PSC Dermpath Diagnostics
AmeriPath Milwaukee, S.C. (WI) | AmeriPath Great Lakes
Colorado Pathology Consultants, P.C. (CO) | AmeriPath Colorado Dermpath Diagnostics
Dermatopathology of Wisconsin, S.C. (WI) |
Diamond Occupational Health Services, P.S.C. (PR) |
Hoffman, M.D., Associated Pathologists Chartered (NV) | AmeriPath Nevada Associated Pathologists, Chartered
Kilpatrick Pathology, P.A. (NC) |
PhenoPath Laboratories, PLLC (WA) |
Southwest Diagnostic Laboratories, P.C. (CO) |
St. Luke’s Pathology Associates, P.A. (KS) | AmeriPath Kansas City

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