EX-21.1 3 dgx12312016ex211.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 Holdings Sarl (Luxembourg) |
| 100% Quest Diagnostics Intermediate Holdings Sarl (Luxembourg) |
|  | 100% Quest Diagnostics Subsidiary Holdings Sarl (Luxembourg) |
|  | 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) |
|  | 100% Quest Diagnostics of Puerto Rico, Inc. (PR) |
|  | 100% Quest Diagnostics do Brasil Ltda. (Brazil) |
|  | 100% Quest Diagnostics Ireland Limited (Ireland) |
|  | 100% Quest Diagnostics Subsidiary Holdings Ltd. (UK) |
| 40% Q Squared Solutions Holdings Limited (UK) |
|  | 100% Quest Diagnostics (Shanghai) Co., Ltd. (China) |
| 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) |
| 100% Lab One of Ohio, Inc. (DE) | Quest Diagnostics LabOne
| (33-l/3%) CompuNet Clinical Laboratories (OH) |
| (44%) Mid America Clinical Laboratories (IN) |
| (51%) Diagnostic Laboratory of Oklahoma LLC (OK) |
| (70%) Quest Diagnostics Domestic Holder LLC (DE) (30% Focus Diagnostics, Inc. (DE)) |
|  | 40% Q Squared Solutions Holdings, LLC (DE) |
| 100% Quest Diagnostics International 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 Investments LLC (DE) |

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Exhibit 21.1

100% Quest Diagnostics LLC (IL) | Quest Diagnostics LLC
100% Quest Diagnostics LLC (MA) | Quest Diagnostics LLC
| 81.1% Quest Diagnostics Massachusetts LLC (MA) |
100% Quest Diagnostics LLC (CT) |
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 Ventures LLC (DE) |
100% ADI Holding Company, Inc. (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% Celera Corporation (DE) |
| 100% Axys Pharmaceuticals, Inc. (DE) |
| 100% Berkeley HeartLab, Inc. (CA) |
100% Focus Diagnostics, Inc. (DE) | Focus/MRL, Inc. Quest Diagnostics
| (30%) Quest Diagnostics Domestic Holder LLC (DE) (70% Quest Diagnostics Clinical Laboratories, Inc. (DE)) |
100% MetWest Inc. (DE) | Quest Diagnostics Incorporated
| 100% Diagnostic Path Lab, Inc. (TX) |
| 49% Sonora Quest Laboratories LLC (AZ) |
100% Spectrum Laboratories Holdings, Inc. (DE) |
| 100% Spectrum Holding Company, Inc. (DE) |
|  | 100% Solstas Lab Partners Group, LLC (NC) | Solstas Lab - Birmingham Solstas Lab - FD Molecular Solstas Lab - Federal Drive Solstas Lab - Mendenhall Oaks Solstas Lab Partners Solstas Lab - Trustee’s Tower Professional Building Southern Diagnostic Laboratories
|  |  | 100% Solstas Lab Partners, LLC (VA) |

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Exhibit 21.1

100% Summit Health, Inc. (MI) | Quest Diagnostics Incorporated Retail Health Network Summit Health Independent Clinical Laboratories
100% Unilab Corporation (DE) | Quest Diagnostics
100% Nomad Massachusetts, Inc. (MA) |
| 100% Laboratorio de Analisis Biomedicos, S.A. (Mexico) |
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 India Private Limited (India) |
100% AmeriPath Group Holdings, Inc. (DE) |
| 100% AmeriPath, Inc. (DE) |
|  | 100% AmeriPath Cincinnati, Inc. (OH) | Richfield Laboratory of Dermatopathology
|  | 100% AmeriPath Cleveland, Inc. (OH) | Dermpath Diagnostics The Diagnostic and Cosmetic Dermatology Center
|  | 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 Specialty Laboratories Florida
|  | 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 Lubbock Outpatient 5.01(a) Corporation (TX) |
|  | 100% AmeriPath Marketing USA, Inc. (FL) | AmeriPath Marketing USA, Inc.

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Exhibit 21.1

|  | 100% AmeriPath New York, LLC (DE) | AmeriPath Gastrointestinal Diagnostics AmeriPath Northeast Dermpath Diagnostics Dermpath Diagnostics NE-Braintree Ackerman Academy of Dermatopathology Dermpath Diagnostics New York Dermpath Diagnostics New England
|  | 100% AmeriPath PAT 5.01(a) Corporation (TX) |
|  | 100% AmeriPath Pittsburgh, Inc. (PA) | Dermpath Diagnostics The Dermatopathology Laboratory
|  | 100% AmeriPath SC, Inc. (SC) |
|  | 100% AmeriPath Texarkana 5.01(a) Corporation (TX) | AmeriPath Chappell Joyce Pathology Chappell Joyce Pathology
|  | 100% AmeriPath Texas Inc. (DE) |
|  | 100% AmeriPath Tucson, Inc. (AZ) |
|  | 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) | Dermpath Diagnostics
|  | 100% Kailash B. Sharma, M.D., Inc. (GA) |
|  | 100% Institute for Dermatopathology, Inc. (PA) | Dermpath Diagnostics
|  | 100% NAPA 5.01(a) Corporation (TX) |
|  | 100% Nuclear Medicine and Pathology Associates (GA) |
|  | 100% Ocmulgee Medical Pathology Association, Inc. (GA) | AmeriPath Georgia Gastrointestinal Diagnostics Dermpath Diagnostics
|  | 100% O’Quinn Medical Pathology Association, LLC (GA) |
|  | 100% PCA of Denver, Inc. (TN) |
|  | 100% Specialty Laboratories, Inc. (CA) | Quest Diagnostics Nichols Institute of Valencia, Inc.
|  | 100% Arizona Pathology Group, Inc. (AZ) | AmeriPath Arizona
|  | 100% TXAR 5.01(a) Corporation (TX) |
Additional Entities Consolidated for Accounting Purposes | Registered Alternate Name
A. Bernard Ackerman, M.D. Dermatopathology, PC (NY) |
AmeriPath Indianapolis, P.C. (IN) | AmeriPath Indianapolis, PSC Dermpath Diagnostics
AmeriPath Institute of Pathology, PC (MI) | Dermpath Diagnostics
AmeriPath Milwaukee, S.C. (WI) |
Colorado Diagnostic Laboratory, LLC (CO) | AmeriPath Colorado
Colorado Pathology Consultants, P.C. (CO) | AmeriPath Colorado Dermpath Diagnostics
Dermatopathology of Wisconsin, S.C. (WI) |
Kilpatrick Pathology, P.A. (NC) |
Diamond Occupational Health Services, P.S.C. (PR) |
Southwest Diagnostic Laboratories, P.C. (CO) |

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Exhibit 21.1

St. Luke’s Pathology Associates, P.A. (KS) | AmeriPath Kansas City St. Luke’s Pathology Associates, P.C.

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