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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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COMP Tracy (Preferred)

2156 W Grant Line Rd,

Ste 200

Tracy, CA 95377

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2.33 mi away

209-207-9969
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
No Drugs Inc - Tracy (Preferred)

652 W 11Th St,

Ste 133

Tracy, CA 95376

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2.43 mi away

800-490-3784
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
Premier Urgent Care, APMC (Preferred)

644 W 12th St,

Tracy, CA 95376

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2.49 mi away

209-832-8984
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
Prime Drug Testing LLC (Preferred)

143 Darcy Pkwy,

Lathrop, CA 95330

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11.04 mi away

209-417-6300
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: Vary
Sunday: Closed
COMP Manteca (Preferred)

165 Saint Dominics Dr,

Ste 202

Manteca, CA 95337

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13.28 mi away

209-824-1893
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
ARCpoint Labs of Manteca (Preferred)

119 N Maple Ave,

Ste A

Manteca, CA 95336

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14.62 mi away

209-629-8282
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
Fastest Labs of Stockton (Preferred)

253 W Louise Ave,

Manteca, CA 95336

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14.98 mi away

209-200-8056
Monday: 10:00 am-6:00 pm
Tuesday: 10:00 am-6:00 pm
Wednesday: 10:00 am-6:00 pm
Thursday: 10:00 am-6:00 pm
Friday: 10:00 am-6:00 pm
Saturday: Closed
Sunday: Closed
Manteca Family Chiropractic (Preferred)

965 E Yosemite Ave,

Ste 9

Manteca, CA 95336

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15.34 mi away

209-239-2121
Monday: 9:00 am-5:00 pm
Tuesday: 9:00 am-12:00 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
San Joaquin Lab Services (Preferred)

130 N Wilson Way,

Stockton, CA 95205

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19.5 mi away

209-703-5003
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
COMP Stockton (Preferred)

1530 E Hammer Ln,

Stockton, CA 95210

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22.75 mi away

209-954-3220
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
Fastest Labs of Modesto (Preferred)

400 12Th St,

Ste 4

Modesto, CA 95354

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26.34 mi away

209-200-8050
Monday: 9:00 am-6:30 pm
Tuesday: 9:00 am-6:30 pm
Wednesday: 9:00 am-6:30 pm
Thursday: 9:00 am-6:30 pm
Friday: 9:00 am-6:30 pm
Saturday: Closed
Sunday: Closed
No Drugs Inc - Fremont (Preferred)

3225 Seldon Ct,

Fremont, CA 94539

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28.62 mi away

800-490-3784
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
Adventist Hlth Lodi Mem - Occ Hlth (Preferred)

800 S Lower Sacramento Rd,

Building B

Lodi, CA 95242

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29.14 mi away

209-339-7441
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
CheckPoint OTC (Preferred)

24326 MISSION BLVD,

STE 3

HAYWARD, CA 94544

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32.09 mi away

510-733-5707
Monday: 9:00 am-11:30 am , 1:00 pm-4:00 pm
Tuesday: 9:00 am-11:30 am , 1:00 pm-4:00 pm
Wednesday: 9:00 am-11:30 am , 1:00 pm-4:00 pm
Thursday: 9:00 am-11:30 am , 1:00 pm-4:00 pm
Friday: 9:00 am-11:30 am , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
ARCpoint Labs of Downtown San Jose (Preferred)

25 N 14Th St,

Ste 160

San Jose, CA 95112

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33.8 mi away

415-991-2780
Monday: 9:00 am-3:00 pm
Tuesday: 9:00 am-3:00 pm
Wednesday: 9:00 am-3:00 pm
Thursday: 9:00 am-3:00 pm
Friday: 9:00 am-3:00 pm
Saturday: 10:00 am-12:00 pm
Sunday: Closed
DNA & Drug Screening Services (Preferred)

242 MERIDIAN AVE,

STE C

San Jose, CA 95126

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35.93 mi away

408-993-9998
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
Romeo Medical Clinic (Preferred)

1801 Colorado Ave,

Ste 130

Turlock, CA 95382

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36.99 mi away

209-216-3333
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
No Drugs Inc - San Jose (Preferred)

3162 Newberry Dr,

Ste 60

San Jose, CA 95118

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37.7 mi away

800-490-3784
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
No Drugs Inc - Martinez (Preferred)

839 Arnold Dr,

Ste 100

Martinez, CA 94553

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38.75 mi away

800-490-3784
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
ARCpoint Labs of Martinez (Preferred)

3237 Alhambra Ave,

Martinez, CA 94553

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39.7 mi away

925-957-6870
Monday: 9:00 am-4:00 pm
Tuesday: 9:00 am-4:00 pm
Wednesday: 9:00 am-4:00 pm
Thursday: 9:00 am-4:00 pm
Friday: 9:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Fastest Labs of Oakland (Preferred)

1610 Harrison St,

Ste A1

Oakland, CA 94612

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42.25 mi away

510-488-3766
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
Fastest Labs of Richmond (Preferred)

4261 Hilltop Dr,

Ste A

Richmond, CA 94803

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47.68 mi away

510-514-0090
Monday: 9:30 am-5:00 pm
Tuesday: 9:30 am-5:00 pm
Wednesday: 9:30 am-5:00 pm
Thursday: 9:30 am-5:00 pm
Friday: 9:30 am-5:00 pm
Saturday: Closed
Sunday: Closed
Medic - Fairfield (Preferred)

1335 Oliver Rd,

Fairfield, CA 94534

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48.42 mi away

707-520-8059
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
North Bay Med Ctr Fairfield (Preferred)

2470 Hilborn Rd,

Ste 110

Fairfield, CA 94534

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48.83 mi away

707-646-4600
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
No Drugs Inc - San Fran (Preferred)

9 Silliman St,

Ste 6

San Francisco, CA 94134

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49.26 mi away

800-490-3784
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
C-DAT LLC (Preferred)

17 Tennesse Street,

Suite 142

Vallejo, CA 94590

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49.53 mi away

707-643-3894
Monday: 7:30 am-3:00 pm
Tuesday: 7:30 am-3:00 pm
Wednesday: 7:30 am-3:00 pm
Thursday: 7:30 am-3:00 pm
Friday: 7:30 am-3:00 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. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.