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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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US Facilities & Operations International Facilities & Operations

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National Drug Screening, LLC (Preferred)

701 Commerce St,

Ste 400-C

Dallas, TX 75202

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0.19 mi away

469-855-1090
Monday: 9:00 am-12:00 pm , 1:30 pm-4:30 pm
Tuesday: 9:00 am-12:00 pm , 1:30 pm-4:30 pm
Wednesday: 9:00 am-12:00 pm , 1:30 pm-4:30 pm
Thursday: 9:00 am-12:00 pm , 1:30 pm-4:30 pm
Friday: 9:00 am-12:00 pm , 1:30 pm-4:30 pm
Saturday: Closed
Sunday: Closed
CareNow- Uptown (Preferred)

2404 Mckinney Ave,

Dallas, TX 75201

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0.97 mi away

214-721-0630
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-6:00 pm
Sunday: 8:00 am-6:00 pm
Quest Diagnostics - Gaston Wadley

3600 Gaston,

Wadley Tower, Suite 270

Dallas, TX 75246

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1.44 mi away

Schedule Appointment 469-978-0765
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
Texas Health UC - Oak Lawn Ave (Preferred)

2720 Oak Lawn Ave,

Dallas, TX 75219

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1.81 mi away

469-495-9162
Monday: 8:00 am-6:00 pm
Tuesday: 8:00 am-6:00 pm
Wednesday: 8:00 am-6:00 pm
Thursday: 8:00 am-6:00 pm
Friday: 8:00 am-6:00 pm
Saturday: 8:00 am-6:00 pm
Sunday: 8:00 am-6:00 pm
CareNow- Oak Lawn (Preferred)

4501 Lemmon Ave,

Dallas, TX 75219

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2.69 mi away

469-672-4238
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-6:00 pm
Sunday: 8:00 am-6:00 pm
CareNow- Lakewood (Preferred)

2221 Abrams Rd,

Dallas, TX 75214

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3.65 mi away

972-674-8510
Monday: 8:00 am-9:00 pm
Tuesday: 8:00 am-9:00 pm
Wednesday: 8:00 am-9:00 pm
Thursday: 8:00 am-9:00 pm
Friday: 8:00 am-9:00 pm
Saturday: 8:00 am-8:00 pm
Sunday: 8:00 am-5:00 pm
Fastest Labs of Irving (Preferred)

1625 W Mockingbird Ln,

Ste 303

Dallas, TX 75235

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4.1 mi away

214-907-5272
Monday: 9:00 am-5:00 pm
Tuesday: 9:00 am-5:00 pm
Wednesday: 9:00 am-5:00 pm
Thursday: 9:00 am-5:00 pm
Friday: 9:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Any Lab Test Now - Lakewood (Preferred)

6333 E Mockingbird Ln,

Ste 121

Dallas, TX 75214

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4.71 mi away

469-372-2269
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: 9:00 am-1:00 pm
Sunday: Closed
Lifeline Urgent Care - Snider (Preferred)

3414 Milton Ave,

Dallas, TX 75205

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4.76 mi away

210-338-6722
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
CareNow- Greenville (Preferred)

4844 Greenville Ave,

Dallas, TX 75206

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4.9 mi away

214-295-9410
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-6:00 pm
Sunday: 8:00 am-6:00 pm
Any Lab Test Now - Dallas (Lovers) (Preferred)

5219 W LOVERS LN,

STE A

DALLAS, TX 75209

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4.97 mi away

214-956-8378
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: 9:00 am-1:00 pm
Sunday: Closed
Good4u Laboratory Services (Preferred)

1417 N Cockrell Hill Rd,

Ste 106

Dallas, TX 75211

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5.01 mi away

469-778-0124
Monday: 9:00 am-4:30 pm
Tuesday: 9:00 am-4:30 pm
Wednesday: 9:00 am-4:30 pm
Thursday: 9:00 am-4:30 pm
Friday: 9:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Southwest Family Medicine Associates (Preferred)

8877 Harry Hines Rd,

Ste 100

Dallas, TX 75235

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5.27 mi away

214-393-2940
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: 8:00 am-12:00 pm
Sunday: Closed
AccuScreen Drug & Alc - Dallas (Preferred)

1720 Regal Row,

Ste 238

Dallas, TX 75235

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5.28 mi away

214-716-0619
Monday: 8:30 am-5:00 pm
Tuesday: 8:30 am-5:00 pm
Wednesday: 8:30 am-5:00 pm
Thursday: 8:30 am-5:00 pm
Friday: 8:30 am-5:00 pm
Saturday: Closed
Sunday: Closed
DOT Medical Drug Testing Svcs (Preferred)

1430 Regal Row,

Ste 300

Dallas, TX 75247

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5.36 mi away

972-843-9494
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
Test First (Preferred)

6300 Samuell Blvd,

Ste 115

Dallas, TX 75228

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5.7 mi away

214-275-6300
Monday: 9:00 am-5:00 pm
Tuesday: 9:00 am-5:00 pm
Wednesday: 9:00 am-5:00 pm
Thursday: 9:00 am-5:00 pm
Friday: 9:00 am-5:00 pm
Saturday: 9:00 am-1:00 pm
Sunday: Closed
Texas Health UC - Northwest Hwy (Preferred)

6411 E Northwest Hwy,

Ste D-120

Dallas, TX 75231

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6.07 mi away

469-495-9110
Monday: 8:00 am-6:00 pm
Tuesday: 8:00 am-6:00 pm
Wednesday: 8:00 am-6:00 pm
Thursday: 8:00 am-6:00 pm
Friday: 8:00 am-6:00 pm
Saturday: 8:00 am-6:00 pm
Sunday: 8:00 am-6:00 pm
DOT Medical Drug Testing Svcs (Preferred)

4801 S Buckner Blvd,

Ste 500

Dallas, TX 75227

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6.41 mi away

945-224-0050
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 - Casa Linda

1151 N Buckner Blvd,

Ste 202

Dallas, TX 75218

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6.45 mi away

Schedule Appointment 214-321-1577
Monday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Tuesday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Wednesday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Thursday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Friday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
CareNow- Casa Linda (Preferred)

9540 GARLAND RD,

STE C408

Dallas, TX 75218

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6.54 mi away

214-321-0015
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: 8:00 am-4:00 pm
Sunday: 8:00 am-4:00 pm
Bluestar Diagnostics - White Rock Lake (Preferred)

10611 Garland Rd,

Ste 112

Dallas, TX 75218

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7.44 mi away

469-694-2842
Monday: 8:30 am-4:00 pm
Tuesday: 8:30 am-4:00 pm
Wednesday: 8:30 am-4:00 pm
Thursday: 8:30 am-4:00 pm
Friday: 8:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Alpha Diagnostixs LLC (Preferred)

5801 Marvin D Love Fwy,

Ste 306

Dallas, TX 75237

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7.71 mi away

469-849-5041
Monday: 9:00 am-4:30 pm
Tuesday: 9:00 am-4:30 pm
Wednesday: 9:00 am-4:30 pm
Thursday: 9:00 am-4:30 pm
Friday: 9:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Mesquite

3230 I- 30 East,

Suite 101

Mesquite, TX 75150

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8.52 mi away

Schedule Appointment 972-686-4602
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Forest Lane

11613 N Central Expy,

Suite 120

Dallas, TX 75243

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8.97 mi away

Schedule Appointment 214-750-9477
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: 8:00 am-1:00 pm
Sunday: Closed
Any Lab Test Now - North Dallas (Preferred)

11930 Preston Rd,

Ste 120

Dallas, TX 75230

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9.03 mi away

214-295-7900
Monday: 8:00 am-6:00 pm
Tuesday: 8:00 am-6:00 pm
Wednesday: 8:00 am-6:00 pm
Thursday: 8:00 am-6:00 pm
Friday: 8:00 am-6:00 pm
Saturday: 9:00 am-1:00 pm
Sunday: Closed
Drug Test First (Preferred)

4343 W Camp Wisdom Rd,

Ste 213

Dallas, TX 75237

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9.35 mi away

214-404-9750
Monday: 9:00 am-6:00 pm
Tuesday: 9:00 am-6:00 pm
Wednesday: 9:00 am-6:00 pm
Thursday: 9:00 am-6:00 pm
Friday: 9:00 am-6:00 pm
Saturday: 9:00 am-1:00 pm
Sunday: Closed
CareNow- Wheatland (Preferred)

39769 Lyndon B Johnson Fwy,

Dallas, TX 75237

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9.62 mi away

972-780-0802
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 - Irving

3501 N Macarthur Blvd,

Ste 420 Bldg 4

Irving, TX 75062

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9.67 mi away

Schedule Appointment 972-258-0601
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Arc Serenity Services (Preferred)

11418 Audelia Rd,

Dallas, TX 75243

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9.71 mi away

844-238-3717
Monday: 9:00 am-6:00 pm
Tuesday: 9:00 am-6:00 pm
Wednesday: 9:00 am-6:00 pm
Thursday: 9:00 am-6:00 pm
Friday: 9:00 am-6:00 pm
Saturday: Closed
Sunday: 10:00 am-2:00 pm
CareNow- Abrams (Preferred)

9323 Lyndon B Johnson Fwy,

Dallas, TX 75243

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9.82 mi away

972-570-3003
Monday: 8:00 am-5:00 am
Tuesday: 8:00 am-5:00 am
Wednesday: 8:00 am-5:00 am
Thursday: 8:00 am-5:00 am
Friday: 8:00 am-5:00 am
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.