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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 - DeKalb Sycamore - Employer Drug Testing Not Offered

3244 Sycamore Rd,

Unit B

DeKalb, IL 60115

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10.6 mi away

Schedule Appointment 815-901-3268
Monday: 6:30 am-11:00 am , 11:30 am-2:00 pm
Tuesday: 6:30 am-11:00 am , 11:30 am-2:00 pm
Wednesday: 6:30 am-11:00 am , 11:30 am-2:00 pm
Thursday: 6:30 am-11:00 am , 11:30 am-2:00 pm
Friday: 6:30 am-11:00 am , 11:30 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Rockford

641 Highgrove Pl,

Rockford, IL 61108

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14.97 mi away

Schedule Appointment 815-229-0219
Monday: 6:00 am-2:00 pm
Tuesday: 6:00 am-2:00 pm
Wednesday: 6:00 am-2:00 pm
Thursday: 6:00 am-2:00 pm
Friday: 6:00 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Rockford Riverside

5901 E Riverside Blvd,

Rockford, IL 61114

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18.36 mi away

Schedule Appointment 779-221-1482
Monday: 8:00 am-8:00 pm
Tuesday: 8:00 am-8:00 pm
Wednesday: 8:00 am-8:00 pm
Thursday: 8:00 am-8:00 pm
Friday: 8:00 am-8:00 pm
Saturday: 8:00 am-2:00 pm
Sunday: Closed
Quest Diagnostics - Elgin

885 S Randall Rd,

Elgin, IL 60123

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24.65 mi away

Schedule Appointment 847-857-0359
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Crystal Lake

260 E Congress Pkwy,

Ste E

Crystal Lake, IL 60014

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26.19 mi away

Schedule Appointment 815-459-5217
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Batavia

1180 W Wilson St,

Ste D

Batavia, IL 60510

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30.06 mi away

Schedule Appointment 630-406-6525
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: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Barrington Pepper

22285 Pepper Rd,

Ste 107

Barrington, IL 60010

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32.15 mi away

Schedule Appointment 224-213-0196
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 - Hoffman Estates

2500 W Higgins Rd,

Ste 460

Hoffman Estates, IL 60169

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34.01 mi away

Schedule Appointment 847-781-0741
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: 6:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Yorkville

507 W Kendall Dr,

Ste 12

Yorkville, IL 60560

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35.85 mi away

Schedule Appointment 331-442-7238
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Inside Walmart Bloomingdale

314 W Army Trail Rd,

Bloomingdale, IL 60108

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37.88 mi away

Schedule Appointment 630-439-7660
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-4:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Aurora Ogden

2088 Ogden Ave,

Ste 240

Aurora, IL 60504

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37.95 mi away

Schedule Appointment 630-692-1539
Monday: 6:00 am-4:30 pm
Tuesday: 6:00 am-4:30 pm
Wednesday: 6:00 am-4:30 pm
Thursday: 6:00 am-4:30 pm
Friday: 6:00 am-4:30 pm
Saturday: 6:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Schaumburg

808 E Woodfield Rd,

Ste 400

Schaumburg, IL 60173

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38.54 mi away

Schedule Appointment 224-301-7530
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-4:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: 7:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Inside Jewel Osco Palatine

423 E Dundee Rd,

Palatine, IL 60074

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39.68 mi away

Schedule Appointment 224-221-3263
Monday: 8:00 am-4:00 pm
Tuesday: 8:00 am-4:00 pm
Wednesday: 8:00 am-4:00 pm
Thursday: 8:00 am-4:00 pm
Friday: 8:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Naperville

640 S Washington St,

Ste 140

Naperville, IL 60540

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41.16 mi away

Schedule Appointment 630-778-9606
Monday: 5:30 am-3:30 pm
Tuesday: 5:30 am-3:30 pm
Wednesday: 5:30 am-3:30 pm
Thursday: 5:30 am-3:30 pm
Friday: 5:30 am-3:30 pm
Saturday: 6:00 am-1:00 pm
Sunday: Closed
Quest Diagnostics - Arlington Heights West

1100 W Central Rd,

Ste 402

Arlington Heights, IL 60005

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41.72 mi away

Schedule Appointment 847-342-0355
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: 7:00 am-12:30 pm
Sunday: Closed
Quest Diagnostics - Lombard North

340 E North Ave,

Lombard, IL 60148

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43.27 mi away

Schedule Appointment 630-932-6647
Monday: 7:30 am-3:30 pm
Tuesday: 7:30 am-3:30 pm
Wednesday: 7:30 am-3:30 pm
Thursday: 7:30 am-3:30 pm
Friday: 7:30 am-3:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Lombard - Employer Drug Screens not offered at this location

2340 S Highland Ave,

Ste 330

Lombard, IL 60148

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44.78 mi away

Schedule Appointment 630-932-2175
Monday: 7:30 am-3:30 pm
Tuesday: 7:30 am-3:30 pm
Wednesday: 7:30 am-3:30 pm
Thursday: 7:30 am-3:30 pm
Friday: 7:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Vernon Hills East

565 Lakeview Pkwy,

Ste 100

Vernon Hills, IL 60061

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44.9 mi away

Schedule Appointment 224-213-1177
Monday: 6:30 am-3:00 pm
Tuesday: 6:30 am-3:00 pm
Wednesday: 6:30 am-3:00 pm
Thursday: 6:30 am-3:00 pm
Friday: 6:30 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Bolingbrook - Employer Drug Testing Not Offered

484 W Boughton Rd,

Ste 100

Bolingbrook, IL 60440

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46.18 mi away

Schedule Appointment 630-759-3773
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: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Woodridge - Employer Drug Screens Not offered at this location

7530 Woodward Ave,

Ste G

Woodridge, IL 60517

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46.94 mi away

Schedule Appointment 630-910-1142
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: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Downers Grove

1113 Fairview Ave,

Westmont, IL 60559

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47.83 mi away

Schedule Appointment 630-353-0597
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 6:30 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Park Ridge

1600 Dempster St,

Ste 218

Park Ridge, IL 60068

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49.73 mi away

Schedule Appointment 847-795-0205
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: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Gurnee

15 Tower Ct,

Ste 170

Gurnee, IL 60031

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49.77 mi away

Schedule Appointment 847-360-1073
Monday: 5:30 am-3:30 pm
Tuesday: 5:30 am-3:30 pm
Wednesday: 5:30 am-3:30 pm
Thursday: 5:30 am-3:30 pm
Friday: 5:30 am-3:30 pm
Saturday: 7:00 am-12:00 pm
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. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.