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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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Rudiel Associates-APPS (Preferred)

3421 W Us Highway 83,

Ste 1

Mcallen, TX 78501

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1.26 mi away

956-686-0300
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
Rio Plex Safety Council (Preferred)

110 S Col Rowe Blvd,

Mcallen, TX 78501

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1.52 mi away

956-928-1967
Monday: 7:00 am-12:00 pm
Tuesday: 7:00 am-12:00 pm
Wednesday: 7:00 am-12:00 pm
Thursday: 7:00 am-12:00 pm
Friday: 7:00 am-12:00 pm
Saturday: Closed
Sunday: Closed
CareNow- McAllen (Preferred)

2901 W Nolana Ave,

Ste 10

Mcallen, TX 78504

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1.64 mi away

956-558-6090
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-7:00 pm
Sunday: 8:00 am-5:00 pm
Pro Lab (Preferred)

4313 N 10th St Ste B,

Mcallen, TX 78504

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1.85 mi away

956-687-7101
Monday: 8:30 am-6:00 pm
Tuesday: 8:30 am-6:00 pm
Wednesday: 8:30 am-6:00 pm
Thursday: 8:30 am-6:00 pm
Friday: 8:30 am-6:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Nova Medical Center - McAllen (Preferred)

403 N JACKSON RD,

PHARR, TX 78577

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2.16 mi away

956-429-3866
Monday: 8:30 am-6:00 pm
Tuesday: 8:30 am-6:00 pm
Wednesday: 8:30 am-6:00 pm
Thursday: 8:30 am-6:00 pm
Friday: 8:30 am-6:00 pm
Saturday: Closed
Sunday: Closed
Industrial Health Works (Preferred)

801 E Nolana Ave,

Ste 6

Mcallen, TX 78504

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2.33 mi away

956-668-7333
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
The Center of Industrial Rehab Services (Preferred)

2120 E Bus 83,

Suite A

Mission, TX 78572

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2.77 mi away

956-618-2400
Monday: 8:00 am-5:30 pm
Tuesday: 8:00 am-5:30 pm
Wednesday: 8:00 am-5:30 pm
Thursday: 8:00 am-5:30 pm
Friday: 8:00 am-5:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - McAllen

1201 East Ridge Road,

Ste A

McAllen, TX 78503

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2.86 mi away

Schedule Appointment 956-682-0353
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
CareNow- San Juan (Preferred)

920 W Interstate 2,

Ste E

San Juan, TX 78589

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4.09 mi away

956-904-4660
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-7:00 pm
Sunday: 8:00 am-5:00 pm
CareNow- Edinburg (Preferred)

293 E Trenton Rd,

Edinburg, TX 78539

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4.83 mi away

956-348-0140
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-7:00 pm
Sunday: 8:00 am-5:00 pm
Logasa Drug Screening LLC (Preferred)

5416 S Expressway 281,

Edinburg, TX 78542

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6.34 mi away

956-720-4090
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
Ashley Family & Industrial Clinic - Pharr (Preferred)

6201 S Cage Blvd,

Ste 6

Pharr, TX 78577

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6.38 mi away

956-961-4458
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
DTM (Preferred)

723 E University Dr,

Edinburg, TX 78539

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7.26 mi away

956-205-0103
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 - Inside Weslaco Walmart Supercenter

1310 N Texas Blvd,

Weslaco, TX 78599

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13.59 mi away

Schedule Appointment 956-261-4258
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: 7:00 am-2:00 pm
Sunday: Closed
DTM - Weslaco (Preferred)

111 W Business 83,

Ste A

Weslaco, TX 78596

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13.78 mi away

956-205-0103
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-12:00 pm
Saturday: Closed
Sunday: Closed
New Choice Drug Testing Svcs (Preferred)

417 Gray Lane Ave,

Ste B

Weslaco, TX 78596

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14.18 mi away

956-463-3004
Monday: 7:30 am-12:00 pm , 1:00 pm-5:00 pm
Tuesday: 7:30 am-12:00 pm , 1:00 pm-5:00 pm
Wednesday: 7:30 am-12:00 pm , 1:00 pm-5:00 pm
Thursday: 7:30 am-12:00 pm , 1:00 pm-5:00 pm
Friday: 7:30 am-12:00 pm , 1:00 pm-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
iCheckU Drug & Alcohol Testing Svc (Preferred)

624 N Tio Ave,

Ste B

Weslaco, TX 78596

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14.44 mi away

956-968-7065
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
Nova Medical Center - Harlingen (Preferred)

216 N Ed Carey Dr,

Ste 1

Harlingen, TX 78550

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29.91 mi away

956-261-4700
Monday: 8:30 am-6:00 pm
Tuesday: 8:30 am-6:00 pm
Wednesday: 8:30 am-6:00 pm
Thursday: 8:30 am-6:00 pm
Friday: 8:30 am-6:00 pm
Saturday: Closed
Sunday: Closed
Medical Associates of Brownsville, PA (Preferred)

425 E Los Ebanos Blvd,

Ste 100

Brownsville, TX 78520

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43.21 mi away

956-546-3116
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
Express Occupational Medicine (Preferred)

585 W Jefferson St,

Brownsville, TX 78520

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44.01 mi away

956-504-7245
Monday: 8:30 am-6:00 pm
Tuesday: 8:30 am-6:00 pm
Wednesday: 8:30 am-6:00 pm
Thursday: 8:30 am-6:00 pm
Friday: 8:30 am-6:00 pm
Saturday: Closed
Sunday: Closed
TX Alc & Drug Testing Srv (Preferred)

2031 E Price Rd,

Ste C

Brownsville, TX 78521

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44.28 mi away

956-546-8900
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- Boca Chica (Preferred)

2114 Boca Chica Blvd,

Brownsville, TX 78521

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44.75 mi away

956-866-8860
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-7:00 pm
Sunday: 8:00 am-5:00 pm
Nova Medical Center - Brownsville (Preferred)

2952 BOCA CHICA BLVD,

BROWNSVILLE, TX 78521

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45.46 mi away

956-243-8888
Monday: 8:30 am-6:00 pm
Tuesday: 8:30 am-6:00 pm
Wednesday: 8:30 am-6:00 pm
Thursday: 8:30 am-6:00 pm
Friday: 8:30 am-6:00 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. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.