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Quest Diagnostics

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Lab testing, laboratory and office locations around the world

Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

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Quest Diagnostics - Northampton

6 Hatfield St,

Northampton, MA 01060

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13.29 mi away

Schedule Appointment 413-428-1260
Monday: 7:00 am-12:30 pm , 1:30 pm-3:30 pm
Tuesday: 7:00 am-12:30 pm , 1:30 pm-3:30 pm
Wednesday: 7:00 am-12:30 pm , 1:30 pm-3:30 pm
Thursday: 7:00 am-12:30 pm , 1:30 pm-3:30 pm
Friday: 7:00 am-12:30 pm , 1:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Pittsfield

42 Summer St,

Ste 305

Pittsfield, MA 01201

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22.16 mi away

Schedule Appointment 413-499-8718
Monday: 7:00 am-12:00 pm , 12:30 pm-3:00 pm
Tuesday: 7:00 am-12:00 pm , 12:30 pm-3:00 pm
Wednesday: 7:00 am-12:00 pm , 12:30 pm-3:00 pm
Thursday: 7:00 am-12:00 pm , 12:30 pm-3:00 pm
Friday: 7:00 am-12:00 pm , 12:30 pm-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Riverdale St PSC

935 Riverdale St,

Ste F103

West Springfield, MA 01089

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25.93 mi away

Schedule Appointment 413-574-0880
Monday: 7:00 am-12:00 pm , 12:30 pm-3:30 pm
Tuesday: 7:00 am-12:00 pm , 12:30 pm-3:30 pm
Wednesday: 7:00 am-12:00 pm , 12:30 pm-3:30 pm
Thursday: 7:00 am-12:00 pm , 12:30 pm-3:30 pm
Friday: 7:00 am-12:00 pm , 12:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Springfield

1284 Saint James Ave,

Springfield, MA 01104

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26.38 mi away

Schedule Appointment 413-755-1711
Monday: 8:00 am-4:30 pm
Tuesday: 8:00 am-4:30 pm
Wednesday: 8:00 am-4:30 pm
Thursday: 8:00 am-4:30 pm
Friday: 8:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Biologic Healthcare

205 Main St,

3Rd Floor

Brattleboro, VT 05301

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30.54 mi away

Schedule Appointment 802-212-1810
Monday: 7:45 am-1:00 pm
Tuesday: 7:45 am-1:00 pm
Wednesday: 7:45 am-1:00 pm
Thursday: 7:45 am-1:00 pm
Friday: Closed
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Granby - Employer Drug Testing Not Offered

18 E Granby Rd,

Ste 203

Granby, CT 06035

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35.57 mi away

Schedule Appointment 860-325-4756
Monday: 7:30 am-4:00 pm
Tuesday: 7:30 am-4:00 pm
Wednesday: 7:30 am-4:00 pm
Thursday: 7:30 am-4:00 pm
Friday: 7:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Enfield 54 Hazard Avenue - Employer Drug Testing Not Offered

54 Hazard Ave,

Suite 90

Enfield, CT 06082

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35.86 mi away

Schedule Appointment 860-698-4838
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Windsor Locks

2 CONCORDE WAY,

STE 3A

Windsor Locks, CT 06096

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38.8 mi away

Schedule Appointment 860-370-2970
Monday: 7:00 am-3:00 pm
Tuesday: 7:00 am-3:00 pm
Wednesday: 7:00 am-3:00 pm
Thursday: 7:00 am-3:00 pm
Friday: 7:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - CHW WINSTED

10 Center St,

Winsted, CT 06098

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39.7 mi away

Schedule Appointment 860-489-0931
Monday: 8:30 am-12:30 pm , 1:00 pm-3:00 pm
Tuesday: 8:30 am-12:30 pm , 1:00 pm-3:00 pm
Wednesday: 8:30 am-12:30 pm , 1:00 pm-3:00 pm
Thursday: 8:30 am-12:30 pm , 1:00 pm-3:00 pm
Friday: 8:30 am-12:30 pm , 1:00 pm-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - HHC 80 South Main St Winds

80 S Main St,

Ll03

Winsted, CT 06098

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39.8 mi away

Schedule Appointment 860-558-1869
Monday: 6:30 am-12:00 pm , 1:00 pm-3:30 pm
Tuesday: 6:30 am-12:00 pm , 1:00 pm-3:30 pm
Wednesday: 6:30 am-12:00 pm , 1:00 pm-3:30 pm
Thursday: 6:30 am-12:00 pm , 1:00 pm-3:30 pm
Friday: 6:30 am-12:00 pm , 1:00 pm-3:30 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Windsor Mack Street - Employer Drug Testing Not Offered

74 Mack St,

Rear Of Bldg

Windsor, CT 06095

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43.43 mi away

Schedule Appointment 860-607-0546
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 100 Simsbury Rd Avon CT

100 Simsbury Rd,

Ste 210

Avon, CT 06001

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44.94 mi away

Schedule Appointment 959-223-5467
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Gardner MA - Employer Drug Testing Not Offered

175 Connors St,

Lower Level

Gardner, MA 01440

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45.07 mi away

Schedule Appointment 978-632-3333
Monday: 8:00 am-5:00 pm
Tuesday: 8:00 am-5:00 pm
Wednesday: 8:00 am-5:00 pm
Thursday: 8:00 am-5:00 pm
Friday: 8:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Avon

54 W Avon Rd,

Ste 104

Avon, CT 06001

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45.22 mi away

Schedule Appointment 860-321-9003
Monday: 7:30 am-5:00 pm
Tuesday: 7:30 am-5:00 pm
Wednesday: 7:30 am-5:00 pm
Thursday: 7:30 am-5:00 pm
Friday: 7:30 am-5:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Bloomfield - Employer Drug Testing Not Offered

701 Cottage Grove Rd,

Bldg B Suite 130

Bloomfield, CT 06002

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45.36 mi away

Schedule Appointment 860-256-2161
Monday: 7:30 am-5:00 pm
Tuesday: 7:20 am-5:00 pm
Wednesday: 7:30 am-5:00 pm
Thursday: 7:30 am-5:00 pm
Friday: 7:30 am-5:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Torrington

1929 E Main St,

Torrington, CT 06790

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46.39 mi away

Schedule Appointment 959-901-5709
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - South Windsor - Employer Drug Testing Not Offered

1735 Ellington Rd,

South Windsor, CT 06074

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46.67 mi away

Schedule Appointment 860-327-9093
Monday: 7:00 am-4:30 pm
Tuesday: 7:00 am-4:30 pm
Wednesday: 7:00 am-4:30 pm
Thursday: 7:00 am-4:30 pm
Friday: 7:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Vernon

444 Hartford Tpke,

Vernon Rockville, CT 06066

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47.98 mi away

Schedule Appointment 860-926-0367
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Hartford Woodland Street

21 Woodland St,

Ste L-23 Ground Fl

Hartford, CT 06105

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48.78 mi away

Schedule Appointment 860-200-7481
Monday: 7:30 am-5:00 pm
Tuesday: 7:30 am-5:00 pm
Wednesday: 7:30 am-5:00 pm
Thursday: 7:30 am-5:00 pm
Friday: 7:30 am-5:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - West Hartford Farmington Avenue - Employer Drug Testing Not Offered

970 Farmington Ave,

Suite 209 Second Floor

West Hartford, CT 06107

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49.01 mi away

Schedule Appointment 860-200-7496
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - East Hartford Connecticut Blvd - Employer Drug Testing Not Offered

477 Connecticut Blvd,

Suite 213 Second Floor

East Hartford, CT 06108

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49.22 mi away

Schedule Appointment 860-200-7491
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Unionville

45 S Main St,

Unionville, CT 06085

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49.22 mi away

Schedule Appointment 860-777-1686
Monday: 6:00 am-12:00 pm
Tuesday: 6:00 am-12:00 pm
Wednesday: 6:00 am-12:00 pm
Thursday: 6:00 am-12:00 pm
Friday: 6:00 am-12:00 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - CHH 540 Litchfield CT Torrington CT

540 Litchfield St,

First Floor

Torrington, CT 06790

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49.27 mi away

Schedule Appointment 860-558-5039
Monday: 6:00 am-5:00 pm
Tuesday: 6:00 am-5:00 pm
Wednesday: 6:00 am-5:00 pm
Thursday: 6:00 am-5:00 pm
Friday: 6:00 am-5:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Manchester-CL 1140

224 N Main St,

Manchester, CT 06042

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49.33 mi away

Schedule Appointment 860-643-7543
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Seymour Street - Employer Drug Testing Not Offered

85 Seymour St,

Ste 215

Hartford, CT 06106

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49.95 mi away

Schedule Appointment 860-200-7484
Monday: 7:00 am-4:00 pm
Tuesday: 7:00 am-4:00 pm
Wednesday: 7:00 am-4:00 pm
Thursday: 7:00 am-4:00 pm
Friday: 7:00 am-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - CCMC PSC - Employer Drug Testing Not Offered

282 Washington St,

Ste 2H

Hartford, CT 06106

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50.0 mi away

Schedule Appointment 860-200-7482
Monday: 7:30 am-4:30 pm
Tuesday: 7:30 am-4:30 pm
Wednesday: 7:30 am-4:30 pm
Thursday: 7:30 am-4:30 pm
Friday: 7:30 am-4:30 pm
Saturday: Closed
Sunday: Closed

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Our company

Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.